Mathematics
Ratio & Proportion (Rule of Three) – Tutorial
On this page, you can find the logic, usage, and important details of the Ratio & Proportion (Rule of Three) calculator.
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Summary
Find the unknown value (x) using direct or inverse proportion. The rule of three solves the relationship: if a → b, then c → x. - Direct proportion: x = (b × c) / a - Inverse proportion: x = (a × b) / c
Input Fields
Proportion Type
Type: select
a
Type: number
Example: E.g.: 5
b
Type: number
Example: E.g.: 10
c
Type: number
Example: E.g.: 8