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Finding the Fourth Proportional to 726.03, 1,089.13 and 480.83

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Solution

The fourth proportional to 726.03, 1,089.13 and 480.83 is: 721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.03 : 1,089.13 = 480.83 : x
  2. Step 2: Convert to fraction form
    726.03/1,089.13 = 480.83/x
  3. Step 3: Cross multiply
    726.03x = 1,089.13 × 480.83
  4. Step 4: Simplify right side
    726.03x = 523,687.90
  5. Step 5: Solve for x
    x = 523,687.90/726.03
  6. Step 6: Final answer
    x = 721.30

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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.