To solve the first equation, we can cross-multiply:

1(x + 2) = 4(3)
x + 2 = 12
x = 10

So, the value of x is 10.

Now, we can plug in the value of x into the second equation:

2 : 10 = 7 : 10
This simplifies to:
2/10 = 7/10

Therefore, the two ratios are equivalent. This means that x = 10 satisfies the given equations.