To solve for x, we can use the following steps:

1. Multiply both sides by 5 to isolate the variable on one side of the equation:

4x/16 = 300

2. Simplify the left side by dividing both sides by 4:

x/4 = 300

3. Multiply both sides by 4 to isolate x:

x = 1200

Therefore, the solution is x = 1200.