Question

2 : x :: 40 : 80 what is answer​

Answer 1

Answer:

2:x :: 40 : 80

=> 2/x = 40/ 80

=> 80× 2 = 40×x

=> 80÷ 40 ×2 = x

=> 2×2 = x = 4

Answer 2

Answer:

Value of $x$ is $4$ .

Step-by-step explanation:

To find : the value of $x$

Given ratio :  $2: x:: 40: 80$

Solution :

• As we can see that in the given ratio of proportion $x$ is missing.  
• In this ratio $2$ and $80$ are called as extremes while $x$ and $40$ are called as means .
• To find missing ratio we can write $2: x:: 40: 80$ as,  $\frac{2}{x}=\frac{40}{80}$
• Transposing  like terms we get,

        $\Rightarrow \quad x=\frac{2 \times 80}{40}$

• On simplifying we get,

       $\Rightarrow x = 2\times 2 \\ \Rightarrow x =4$