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Finding the Fourth Proportional to 731.02, 1,003.05 and 724.14

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Solution

The fourth proportional to 731.02, 1,003.05 and 724.14 is: 993.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.02 : 1,003.05 = 724.14 : x
  2. Step 2: Convert to fraction form
    731.02/1,003.05 = 724.14/x
  3. Step 3: Cross multiply
    731.02x = 1,003.05 × 724.14
  4. Step 4: Simplify right side
    731.02x = 726,348.63
  5. Step 5: Solve for x
    x = 726,348.63/731.02
  6. Step 6: Final answer
    x = 993.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.