Euclid:Proposition/IX/19

Proposition

In the words of Euclid:

Given three numbers, to investigate whether it is possible to find a fourth proportional to them.

(The Elements: Book $\text{IX}$: )


Sources

  • 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 2 (2nd ed.) ... (previous) ... (next): Book $\text{IX}$. Propositions
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