4:x=2:5решить соотношение пропорции

To solve the proportion, you can cross multiply:

4x = 2 * 5

Simplifying the right side:

4x = 10

Now, divide both sides by 4 to solve for x:

x = 10/4

Simplifying further:

x = 2.5

So, the solution to the given proportion is x = 2.5.