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Finding the Fourth Proportional to 432.77, 649.12 and 124.71

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Solution

The fourth proportional to 432.77, 649.12 and 124.71 is: 187.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.77 : 649.12 = 124.71 : x
  2. Step 2: Convert to fraction form
    432.77/649.12 = 124.71/x
  3. Step 3: Cross multiply
    432.77x = 649.12 × 124.71
  4. Step 4: Simplify right side
    432.77x = 80,951.13
  5. Step 5: Solve for x
    x = 80,951.13/432.77
  6. Step 6: Final answer
    x = 187.05

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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.