Proposition: Prop. 9.18: Condition for Existence of Third Number Proportional to Two Numbers
For two given numbers, to investigate whether it is possible to find a third (number) proportional to them.
* Let $A$ and $B$ be the two given numbers.
* And let it be required to investigate whether it is possible to find a third (number) proportional to them.
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Table of Contents
Adapted from (subject to copyright, with kind permission)
- Fitzpatrick, Richard: Euclid's "Elements of Geometry"
Adapted from CC BY-SA 3.0 Sources:
- Prime.mover and others: "Pr∞fWiki", https://proofwiki.org/wiki/Main_Page, 2016