Question

State True or False

The third proportion between $0.2$ and $0.8$ is $0.4$.

• A. True
• B. False

Answer 1

The correct option is A True

If a : b :: b : c, then we say that a, b, c are in continued
proportion, and c is the third proportional of a and b.
Here, $b^2=ac$ or $b=\sqrt{ac}$
So, for $0.2,0.8$, the third proportional is $b=\sqrt{ac}=\sqrt{0.2\times 0.8}=\sqrt{0.16}=0.4$