Mathematical Calculators

Rule Of Three Calculator - Direct Proportion

Calculate easily direct proportion of numbers with our free Rule of Three calculator.

Rule of Three Calculator

Fill out the two upper fields and one of the lower. Fourth value will be calculated.

Corresponds to

Corresponds to

Table of contents

What is the rule of three?
Direct Rule of Three
Inverse rule of three

What is the rule of three?

The rule is three is a simple calculation that allows one to calculate something in three steps. This is a common method of calculating simple formulas. The principle behind it is quite simple: You must do the same on both sides in order to reach your desired result.

Direct Rule of Three

If one magnitude is greater, the other also increases in the same proportion.
a / b = c / d
It is possible to calculate a, b and c. To calculate d:
d = c * b / a

Inverse rule of three

In the same proportion, if one magnitude is greater, the other one will decrease.
It is possible to calculate d by using the following formulae: a, b and c. To calculate d:
d = a * b / c

Parmis Kazemi
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Parmis Kazemi
Parmis is a content creator who has a passion for writing and creating new things. She is also highly interested in tech and enjoys learning new things.

Rule Of Three Calculator - Direct Proportion English
Published: Wed Jan 12 2022
In category Mathematical calculators
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