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Finding the Fourth Proportional to 726.26, 1,087.04 and 379.10

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Solution

The fourth proportional to 726.26, 1,087.04 and 379.10 is: 567.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.26 : 1,087.04 = 379.10 : x
  2. Step 2: Convert to fraction form
    726.26/1,087.04 = 379.10/x
  3. Step 3: Cross multiply
    726.26x = 1,087.04 × 379.10
  4. Step 4: Simplify right side
    726.26x = 412,100.53
  5. Step 5: Solve for x
    x = 412,100.53/726.26
  6. Step 6: Final answer
    x = 567.43

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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.