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Finding the Fourth Proportional to 616.70, 925.05 and 515.90

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Solution

The fourth proportional to 616.70, 925.05 and 515.90 is: 773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.70 : 925.05 = 515.90 : x
  2. Step 2: Convert to fraction form
    616.70/925.05 = 515.90/x
  3. Step 3: Cross multiply
    616.70x = 925.05 × 515.90
  4. Step 4: Simplify right side
    616.70x = 477,233.30
  5. Step 5: Solve for x
    x = 477,233.30/616.70
  6. Step 6: Final answer
    x = 773.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.