To find the diameter of the circle, you can use the formula for the circumference of a circle:
\[ C = \pi \times d \]
Where \(C\) is the circumference and \(d\) is the diameter. We can rearrange this formula to solve for \(d\):
\[ d = \frac{C}{\pi} \]
Given that the circumference \(C\) is approximately 574 meters and using \(\pi \approx 3.14\):
\[ d = \frac{574}{3.14} \]
Now, performing the calculation:
\[ d \approx 182.4 \text{ meters} \]
Rounded to the nearest tenth, the diameter of the circle is:
\[ \boxed{182.4} \text{ meters} \]