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Finding the Fourth Proportional to 752.81, 1,127.92 and 676.72

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Solution

The fourth proportional to 752.81, 1,127.92 and 676.72 is: 1,013.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.81 : 1,127.92 = 676.72 : x
  2. Step 2: Convert to fraction form
    752.81/1,127.92 = 676.72/x
  3. Step 3: Cross multiply
    752.81x = 1,127.92 × 676.72
  4. Step 4: Simplify right side
    752.81x = 763,286.02
  5. Step 5: Solve for x
    x = 763,286.02/752.81
  6. Step 6: Final answer
    x = 1,013.92

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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.