Finding the Fourth Proportional to 489.36, 734.08 and 318
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Solution
The fourth proportional to 489.36, 734.08 and 318 is: 477.03
Step by Step Solution
- Step 1: Write the proportion equation
489.36 : 734.08 = 318 : x - Step 2: Convert to fraction form
489.36/734.08 = 318/x - Step 3: Cross multiply
489.36x = 734.08 × 318 - Step 4: Simplify right side
489.36x = 233,437.44 - Step 5: Solve for x
x = 233,437.44/489.36 - Step 6: Final answer
x = 477.03
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.