\[ 7 \frac{1}{4} \text { inches }= \] centimeters. Round to the nearest tenth.

Step 1 ：The question is asking to convert 7 1/4 inches to centimeters. To do this, we need to know the conversion factor between inches and centimeters. The conversion factor is 1 inch = 2.54 centimeters. We can multiply the given inches by this conversion factor to get the equivalent in centimeters.

Step 2 ：First, convert the mixed number 7 1/4 to a decimal. This gives us 7.25 inches.

Step 3 ：Next, multiply 7.25 inches by the conversion factor of 2.54 cm/inch. This gives us approximately 18.415 centimeters.

Step 4 ：Finally, round the result to the nearest tenth to get \(\boxed{18.4}\) centimeters.