Finding the Third Proportional to 478 and 621
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Solution
The third proportional to 478 and 621 is: 806.78
Step by Step Solution
- Step 1: Write the proportion equation
478 : 621 = 621 : x - Step 2: Convert to fraction form
478/621 = 621/x - Step 3: Cross multiply
478x = 621 × 621 - Step 4: Simplify right side
478x = 385,641 - Step 5: Solve for x
x = 385,641/478 - Step 6: Final answer
x = 806.78
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These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.