Shari walks at a pace of 3 miles per hour, so in 1 hour, she walks 3 miles.
After 1.5 hours, she would have walked $1.5 \times 3 = 4.5$ miles.
Rounded to the nearest tenth of a mile, Shari walked $\boxed{4.5}$ miles.The answer is: 4.5
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Shari walks at a steady pace of 3 miles per hour. How far did she walk after 1.5 hours, rounded to the nearest tenth of a mile?

### Answer:
