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Finding the Third Proportional to 616.13 and 915.56

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Solution

The third proportional to 616.13 and 915.56 is: 1,360.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.13 : 915.56 = 915.56 : x
  2. Step 2: Convert to fraction form
    616.13/915.56 = 915.56/x
  3. Step 3: Cross multiply
    616.13x = 915.56 × 915.56
  4. Step 4: Simplify right side
    616.13x = 838,254.69
  5. Step 5: Solve for x
    x = 838,254.69/616.13
  6. Step 6: Final answer
    x = 1,360.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.