Find a third proportional to the numbers 4 and 5 .
Answer & explanation
Correct answer: option 2
⇒ a : b :: b : c
Third proportion (c) = \(\frac{b^2}{a}\)
Here,
a = 4, b = 5,
∴ c = \(\frac{b^2}{a}\) = \(\frac{25}{4}\) = 6.25
Find a third proportional to the numbers 4 and 5 .
Correct answer: option 2
⇒ a : b :: b : c
Third proportion (c) = \(\frac{b^2}{a}\)
Here,
a = 4, b = 5,
∴ c = \(\frac{b^2}{a}\) = \(\frac{25}{4}\) = 6.25