Definition:Inverse Ratio

Definition

Let $R = a : b$ be a ratio.

Then the inverse ratio to $R$ is $b : a$.

In the words of Euclid:

Inverse ratio means taking the consequent as antecedent in relation to the antecedent as consequent.

(The Elements: Book $\text{V}$: Definition $13$)

Also known as

An inverse ratio is also known as a reciprocal ratio.

Also see

• Results about inverse ratio can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): inverse ratio (reciprocal ratio)
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): inverse ratio (reciprocal ratio)