A student is analyzing a mixture of food colorings using paper chromatography.
One of the dyes, dye X, has an Rf\text{R}_\text{f}Rf value of 0.720.720.72. On the chromatogram, the spot for dye X traveled a distance of 5.4 cm5.4\text{ cm}5.4 cm from the start line.
Calculate the distance traveled by the solvent front in centimeters.