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Finding the Fourth Proportional to 726.13, 1,002.61 and 446.75

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Solution

The fourth proportional to 726.13, 1,002.61 and 446.75 is: 616.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.13 : 1,002.61 = 446.75 : x
  2. Step 2: Convert to fraction form
    726.13/1,002.61 = 446.75/x
  3. Step 3: Cross multiply
    726.13x = 1,002.61 × 446.75
  4. Step 4: Simplify right side
    726.13x = 447,916.02
  5. Step 5: Solve for x
    x = 447,916.02/726.13
  6. Step 6: Final answer
    x = 616.85

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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.