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Finding the Fourth Proportional to 726.71, 1,002.81 and 423.97

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Solution

The fourth proportional to 726.71, 1,002.81 and 423.97 is: 585.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.71 : 1,002.81 = 423.97 : x
  2. Step 2: Convert to fraction form
    726.71/1,002.81 = 423.97/x
  3. Step 3: Cross multiply
    726.71x = 1,002.81 × 423.97
  4. Step 4: Simplify right side
    726.71x = 425,160.44
  5. Step 5: Solve for x
    x = 425,160.44/726.71
  6. Step 6: Final answer
    x = 585.05

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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.