To determine the missing value in the conversion chart from yards to inches, we need to understand the relationship between yards and inches.
1 yard is equal to 36 inches.
Given the chart:
- For 3 yards: \[ 3 \text{ yards} = 3 \times 36 \text{ inches} = 108 \text{ inches} \]
- For 6 yards: \[ 6 \text{ yards} = 6 \times 36 \text{ inches} = 216 \text{ inches} \]
- For 8 yards: \[ 8 \text{ yards} = 8 \times 36 \text{ inches} = 288 \text{ inches} \]
- For 11 yards: \[ 11 \text{ yards} = 11 \times 36 \text{ inches} = 396 \text{ inches} \]
Now we can see that the missing value for 6 yards is 216 inches.
Thus, the answer is \( \text{216} \).