Question

The third proportional to 1 and 2 is?
A. 2
B. 3
C. 4
D. 1​

Answer 1

The thurd proportional to 1 and 2 is 4

Answer 2

Answer:

C. 4

Step-by-step explanation:

First, you have to find the third proportional of 1 and 2.

1:2=2:x

Switch sides.

$\displaystyle \mathsf{\frac{1}{2}=\frac{2}{x}  }}$

Rewrite the problem down.

$\displaystyle \mathsf{\frac{2*2}{1} }}$

Solve.

$\displaystyle \mathsf{2*2=4\div1=\boxed{\rightarrow \mathsf{4}}}$

So, the third proportional of 1 and 2 is 4, which is our answer.