To convert yards to inches, you can use the conversion factor that 1 yard is equal to 36 inches.
So, to convert 4.5 yards to inches:
\[ 4.5 \text{ yd} \times 36 \text{ in/yd} = 162 \text{ in} \]
Therefore, \(4.5 \text{ yd} = 162 \text{ in}\).
The answer is 162.