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Finding the Fourth Proportional to 626.33, 938.82 and 488.90

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Solution

The fourth proportional to 626.33, 938.82 and 488.90 is: 732.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.33 : 938.82 = 488.90 : x
  2. Step 2: Convert to fraction form
    626.33/938.82 = 488.90/x
  3. Step 3: Cross multiply
    626.33x = 938.82 × 488.90
  4. Step 4: Simplify right side
    626.33x = 458,989.10
  5. Step 5: Solve for x
    x = 458,989.10/626.33
  6. Step 6: Final answer
    x = 732.82

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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.