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Finding the Fourth Proportional to 498.98, 748.49 and 133.79

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Solution

The fourth proportional to 498.98, 748.49 and 133.79 is: 200.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.98 : 748.49 = 133.79 : x
  2. Step 2: Convert to fraction form
    498.98/748.49 = 133.79/x
  3. Step 3: Cross multiply
    498.98x = 748.49 × 133.79
  4. Step 4: Simplify right side
    498.98x = 100,136.07
  5. Step 5: Solve for x
    x = 100,136.07/498.98
  6. Step 6: Final answer
    x = 200.68

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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.