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Finding the Fourth Proportional to 498.86, 748.24 and 133.68

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Solution

The fourth proportional to 498.86, 748.24 and 133.68 is: 200.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.86 : 748.24 = 133.68 : x
  2. Step 2: Convert to fraction form
    498.86/748.24 = 133.68/x
  3. Step 3: Cross multiply
    498.86x = 748.24 × 133.68
  4. Step 4: Simplify right side
    498.86x = 100,024.39
  5. Step 5: Solve for x
    x = 100,024.39/498.86
  6. Step 6: Final answer
    x = 200.50

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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.