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Finding the Fourth Proportional to 432.66, 649.09 and 124.53

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Solution

The fourth proportional to 432.66, 649.09 and 124.53 is: 186.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.66 : 649.09 = 124.53 : x
  2. Step 2: Convert to fraction form
    432.66/649.09 = 124.53/x
  3. Step 3: Cross multiply
    432.66x = 649.09 × 124.53
  4. Step 4: Simplify right side
    432.66x = 80,831.18
  5. Step 5: Solve for x
    x = 80,831.18/432.66
  6. Step 6: Final answer
    x = 186.82

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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.