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Finding the Fourth Proportional to 499.28, 749.30 and 252.74

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Solution

The fourth proportional to 499.28, 749.30 and 252.74 is: 379.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.28 : 749.30 = 252.74 : x
  2. Step 2: Convert to fraction form
    499.28/749.30 = 252.74/x
  3. Step 3: Cross multiply
    499.28x = 749.30 × 252.74
  4. Step 4: Simplify right side
    499.28x = 189,375.90
  5. Step 5: Solve for x
    x = 189,375.90/499.28
  6. Step 6: Final answer
    x = 379.30

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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.