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Finding the Fourth Proportional to 498.95, 748.45 and 133.74

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Solution

The fourth proportional to 498.95, 748.45 and 133.74 is: 200.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.95 : 748.45 = 133.74 : x
  2. Step 2: Convert to fraction form
    498.95/748.45 = 133.74/x
  3. Step 3: Cross multiply
    498.95x = 748.45 × 133.74
  4. Step 4: Simplify right side
    498.95x = 100,100.68
  5. Step 5: Solve for x
    x = 100,100.68/498.95
  6. Step 6: Final answer
    x = 200.62

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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.