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Finding the Fourth Proportional to 576.90, 863.76 and 437.66

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Solution

The fourth proportional to 576.90, 863.76 and 437.66 is: 655.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.90 : 863.76 = 437.66 : x
  2. Step 2: Convert to fraction form
    576.90/863.76 = 437.66/x
  3. Step 3: Cross multiply
    576.90x = 863.76 × 437.66
  4. Step 4: Simplify right side
    576.90x = 378,033.20
  5. Step 5: Solve for x
    x = 378,033.20/576.90
  6. Step 6: Final answer
    x = 655.28

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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.