To determine how many heads of lettuce Timothy would need to feed 275 guests, we can set up a proportion based on the information given.
We know from the problem that:
- 37 heads of lettuce are needed to feed 100 guests.
We can express this as a ratio: \[ \frac{37 \text{ heads}}{100 \text{ guests}} \]
We want to find out how many heads of lettuce \( x \) are needed for 275 guests. This can be expressed as: \[ \frac{x \text{ heads}}{275 \text{ guests}} \]
Now we can set up the proportion: \[ \frac{37}{100} = \frac{x}{275} \]
To solve for \( x \), we can cross-multiply: \[ 37 \times 275 = 100 \times x \]
This means: \[ x = \frac{37 \times 275}{100} \]
Now you can calculate \( x \) to find out how many heads of lettuce are needed for 275 guests.
Thus, the ratio that illustrates how many heads of lettuce \( x \) he would need to feed 275 guests is: \[ \frac{37}{100} = \frac{x}{275} \]
This is the correct representation for the problem.