
Welcome to the Dauntless Aviation Glossary!
At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasiofficial,
and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies
to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including
our FAA written test prep and FAA practical test prep software and apps. If you like this glossary,
you'll love them with their polished learning environments and world's best and clearest content (please do give them a try.).

Ratio
Ratio   The comparison of two numbers or quantities.  source: FAA Aviation Maintenance Technician General Handbook (FAAH808330) 
  In mathematics, a ratio is a relationship between two numbers of the same kind (e.g., objects, persons, students, spoonfuls, units of whatever identical dimension), expressed as "a to b" or a:b, sometimes expressed arithmetically as a dimensionless quotient of the two that explicitly indicates how many times the first number contains the second (not necessarily an integer). In layman's terms a ratio represents, for every amount of one thing, how much there is of another thing. For example, supposing one has 8 oranges and 6 lemons in a bowl of fruit, the ratio of oranges to lemons would be 4:3 (which is equivalent to 8:6) while the ratio of lemons to oranges would be 3:4. Additionally, the ratio of oranges to the total amount of fruit is 4:7 (equivalent to 8:14). The 4:7 ratio can be further converted to a fraction of 4/7 to represent how much of the fruit is oranges. The ratio of numbers A and B can be expressed as:  the ratio of A to B
 A is to B (often followed by "as ...")
 A:B
 A fraction (rational number) that is the quotient A divided by B: A/B
The numbers A and B are sometimes called terms with A being the antecedent and B being the consequent. The proportion expressing the equality of the ratios A:B and C:D is written A:B = C:D or A:B::C:D. This latter form, when spoken or written in the English language, is often expressed as A, B, C and D are called the terms of the proportion. A and D are called the extremes, and B and C are called the means. The equality of three or more proportions is called a continued proportion. Ratios are sometimes used with three or more terms. The ratio of the dimensions of a "two by four" that is ten inches long is 2:4:10. A good concrete mix is sometimes quoted as 1:2:4 for the ratio of cement to sand to gravel. For a mixture of 4/1 cement to water, it could be said that the ratio of cement to water is 4:1, that there is 4 times as much cement as water, or that there is a quarter (1/4) as much water as cement.. Older televisions have a 4:3 aspect ratio, which means that the width is 4/3 of the height; modern widescreen TVs have a 16:9 aspect ratio.  source: Wikitionary / Wikipedia and Related Sources (Edited) 
 

Ace Any FAA Written Test!

Actual FAA Questions / Free Lifetime Updates 

The best explanations in the business 

Fast, efficient study. 

Pass Your Checkride With Confidence!

FAA Practical Test prep that reflects actual checkrides. 

Any checkride: Airplane, Helicopter, Glider, etc. 

Written and maintained by actual pilot examiners and master CFIs. 

The World's Most Trusted eLogbook

Be Organized, Current, Professional, and Safe. 

Highly customizable  for student pilots through pros. 

Free Transition Service for users of other eLogs. 

Disclaimer: While this glossary in most cases is likely to be highly accurate and useful, sometimes, for any number of editorial, transcription, technical, and other reasons, it might not be.
Additionally, as somtimes you may have found yourself brought to this page through an automated term matching system, you may find definitions here that do not match the cotext or application in which
you saw the original term. Please use your good judgement when using this resource.

© 2023 Dauntless Aviation • 4950C York Road 110, Buckingham, PA, 18912, USA •
Contact Us •
Privacy Policy

