If 1.75:x:: 5:8, then the value of x is:

Correct option is C

Given:
1.75:x :: 5:8
Formula Used:
In a proportion, a:b :: c:d means a/b = c/d.
Solution:
​$$\frac{1.75}{x} = \frac{5}{8} \\\ \\x = \frac{1.75 \times 8}{5} \\\ \\x = \frac{14}{5}$$​​
x = 2.8