To find the unknown value \( x \) in the table that corresponds to the distance traveled for 3 gallons of gasoline used, we can set up a ratio based on the relationship between distance traveled and gasoline used.
Since the car travels 22 miles for every 1 gallon of gasoline, we can express this as a ratio:
\[ \frac{22 \text{ miles}}{1 \text{ gallon}} \]
For 3 gallons of gasoline used, the distance traveled would be represented as \( x \) miles:
\[ \frac{x \text{ miles}}{3 \text{ gallons}} \]
To find \( x \), we can set the two ratios equal to each other:
\[ \frac{22}{1} = \frac{x}{3} \]
In this context, the correct equation that represents the equivalent ratios is:
4. \(\frac{22}{1} = \frac{x}{3}\)
So, the answer is 4.