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Finding the Fourth Proportional to 616.54, 922.47 and 411.61

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Solution

The fourth proportional to 616.54, 922.47 and 411.61 is: 615.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.54 : 922.47 = 411.61 : x
  2. Step 2: Convert to fraction form
    616.54/922.47 = 411.61/x
  3. Step 3: Cross multiply
    616.54x = 922.47 × 411.61
  4. Step 4: Simplify right side
    616.54x = 379,697.88
  5. Step 5: Solve for x
    x = 379,697.88/616.54
  6. Step 6: Final answer
    x = 615.85

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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.