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Finding the Fourth Proportional to 1,331.06, 1,997.56 and 498.88

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Solution

The fourth proportional to 1,331.06, 1,997.56 and 498.88 is: 748.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.06 : 1,997.56 = 498.88 : x
  2. Step 2: Convert to fraction form
    1,331.06/1,997.56 = 498.88/x
  3. Step 3: Cross multiply
    1,331.06x = 1,997.56 × 498.88
  4. Step 4: Simplify right side
    1,331.06x = 996,542.73
  5. Step 5: Solve for x
    x = 996,542.73/1,331.06
  6. Step 6: Final answer
    x = 748.68

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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.