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

 ◦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  Article author
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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