One side of the triangle is 7.4 in., And the second is 3.2 cm longer than the first, and the third is a fraction

One side of the triangle is 7.4 in., And the second is 3.2 cm longer than the first, and the third is a fraction of 4.5 from the value of the sum of the first two. What is the perimeter of this triangle?

1. Find the value of the second side of the triangle:

7.4 + 3.2 = 10.6 dm;

2. Determine the sum of the first and second sides of the triangle:

7.4 + 10.6 = 18 dm;

3. Determine the size of the third side of the triangle:

18 x (4/5) = (18 x 4): 5 = 72: 5 = 14.4 dm.

4. Determine the perimeter of the triangle:

7.4 +10.6 + 14.4 = 32.4 dm.

Answer: The perimeter of the triangle is 32.4 decimeters.