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Finding the Fourth Proportional to 626.20, 863.41 and 531.49

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Solution

The fourth proportional to 626.20, 863.41 and 531.49 is: 732.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.20 : 863.41 = 531.49 : x
  2. Step 2: Convert to fraction form
    626.20/863.41 = 531.49/x
  3. Step 3: Cross multiply
    626.20x = 863.41 × 531.49
  4. Step 4: Simplify right side
    626.20x = 458,890.48
  5. Step 5: Solve for x
    x = 458,890.48/626.20
  6. Step 6: Final answer
    x = 732.82

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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.