Finding the Third Proportional to 487 and 1,315
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Solution
The third proportional to 487 and 1,315 is: 3,550.77
Step by Step Solution
- Step 1: Write the proportion equation
487 : 1,315 = 1,315 : x - Step 2: Convert to fraction form
487/1,315 = 1,315/x - Step 3: Cross multiply
487x = 1,315 × 1,315 - Step 4: Simplify right side
487x = 1,729,225 - Step 5: Solve for x
x = 1,729,225/487 - Step 6: Final answer
x = 3,550.77
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These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.