7,2:2,4=0,9:x

To solve the equation 7.2:2.4 = 0.9:x, we can cross-multiply.

First, let's rewrite the equation to make it easier to work with:

7.2 ÷ 2.4 = 0.9 ÷ x

Now, cross-multiply:

7.2 * x = 2.4 * 0.9

7.2x = 2.16

To isolate x, divide both sides of the equation by 7.2:

x = 2.16 ÷ 7.2

Simplifying the division:

x ≈ 0.3

So, when solving the equation, x is approximately equal to 0.3.