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Finding the Fourth Proportional to 411.12, 616.60 and 122.52

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Solution

The fourth proportional to 411.12, 616.60 and 122.52 is: 183.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.12 : 616.60 = 122.52 : x
  2. Step 2: Convert to fraction form
    411.12/616.60 = 122.52/x
  3. Step 3: Cross multiply
    411.12x = 616.60 × 122.52
  4. Step 4: Simplify right side
    411.12x = 75,545.83
  5. Step 5: Solve for x
    x = 75,545.83/411.12
  6. Step 6: Final answer
    x = 183.76

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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.