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Finding the Fourth Proportional to 1,073.49, 1,481.49 and 631.73

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Solution

The fourth proportional to 1,073.49, 1,481.49 and 631.73 is: 871.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.49 : 1,481.49 = 631.73 : x
  2. Step 2: Convert to fraction form
    1,073.49/1,481.49 = 631.73/x
  3. Step 3: Cross multiply
    1,073.49x = 1,481.49 × 631.73
  4. Step 4: Simplify right side
    1,073.49x = 935,905.38
  5. Step 5: Solve for x
    x = 935,905.38/1,073.49
  6. Step 6: Final answer
    x = 871.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.