Proportion Calculator
Enter three known values in a proportion (a/b = c/d) to solve for the fourth.
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Formula
d = (b × c) ÷ a
Example
If 2/4 = 3/d, then d = 6.
Frequently Asked Questions
- What is a proportion used for?
- Proportions are used to scale recipes, maps, currency conversions, and any situation where two ratios must stay equal.
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