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Finding the Fourth Proportional to 498.99, 748.48 and 133.80

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Solution

The fourth proportional to 498.99, 748.48 and 133.80 is: 200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.99 : 748.48 = 133.80 : x
  2. Step 2: Convert to fraction form
    498.99/748.48 = 133.80/x
  3. Step 3: Cross multiply
    498.99x = 748.48 × 133.80
  4. Step 4: Simplify right side
    498.99x = 100,146.62
  5. Step 5: Solve for x
    x = 100,146.62/498.99
  6. Step 6: Final answer
    x = 200.70

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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.