Question

X : 5,4 = -10,2 : 1,8

Answer 1

Произведение средних равно произведению крайних.
5,4 •10,2
х=-----------------= 30,6
1,8

Answer 2

It looks like you're trying to set up a proportion and solve for one of the missing values. In a proportion, two ratios are equal to each other. Let's solve for the missing value, which appears to be X:

X : 5 = -10 : 2 : 1.8

First, simplify the ratios:

X/5 = -10/2 : 1.8

Now, simplify each ratio:

X/5 = -5 : 1.8

Now, cross-multiply:

X * 1.8 = 5 * -5

X * 1.8 = -25

Now, solve for X by dividing both sides by 1.8:

X = -25 / 1.8 ≈ -13.89 (rounded to two decimal places)

So, the value of X is approximately -13.89.