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Finding the Fourth Proportional to 498.70, 748.28 and 267.78

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Solution

The fourth proportional to 498.70, 748.28 and 267.78 is: 401.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.70 : 748.28 = 267.78 : x
  2. Step 2: Convert to fraction form
    498.70/748.28 = 267.78/x
  3. Step 3: Cross multiply
    498.70x = 748.28 × 267.78
  4. Step 4: Simplify right side
    498.70x = 200,375.09
  5. Step 5: Solve for x
    x = 200,375.09/498.70
  6. Step 6: Final answer
    x = 401.80

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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.