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Finding the Fourth Proportional to 726.53, 1,000.42 and 620.82

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Solution

The fourth proportional to 726.53, 1,000.42 and 620.82 is: 854.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.53 : 1,000.42 = 620.82 : x
  2. Step 2: Convert to fraction form
    726.53/1,000.42 = 620.82/x
  3. Step 3: Cross multiply
    726.53x = 1,000.42 × 620.82
  4. Step 4: Simplify right side
    726.53x = 621,079.19
  5. Step 5: Solve for x
    x = 621,079.19/726.53
  6. Step 6: Final answer
    x = 854.86

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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.