When two rectangles are similar, the ratios of their corresponding lengths and heights (widths and heights) are equal. If rectangle QRST is similar to rectangle ACD, we can denote the width and height of rectangle QRST as \( w_{QRST} \) and \( h_{QRST} \), and the width and height of rectangle ACD as \( w_{ACD} \) and \( h_{ACD} \).
The ratios of the corresponding sides will be expressed as:
\[ \frac{w_{QRST}}{w_{ACD}} = \frac{h_{QRST}}{h_{ACD}} = k \]
where \( k \) is the constant of proportionality that represents the similarity ratio.
To identify the specific ratios, you would need the dimensions of both rectangles. If you provide the lengths of the sides of rectangles QRST and ACD, I can help you calculate the specific ratios.