Find a third proportional to the numbers 2 and 4.
Answer & explanation
Correct answer: option 3
⇒ a : b :: b : c
Third proportion (c) = \(\frac{b^2}{a}\)
Here,
a = 2, b = 4,
∴ c = \(\frac{b^2}{a}\) = \(\frac{16}{2}\) = 8
Find a third proportional to the numbers 2 and 4.
Correct answer: option 3
⇒ a : b :: b : c
Third proportion (c) = \(\frac{b^2}{a}\)
Here,
a = 2, b = 4,
∴ c = \(\frac{b^2}{a}\) = \(\frac{16}{2}\) = 8