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Finding the Fourth Proportional to 636.22, 952.44 and 391.96

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Solution

The fourth proportional to 636.22, 952.44 and 391.96 is: 586.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.22 : 952.44 = 391.96 : x
  2. Step 2: Convert to fraction form
    636.22/952.44 = 391.96/x
  3. Step 3: Cross multiply
    636.22x = 952.44 × 391.96
  4. Step 4: Simplify right side
    636.22x = 373,318.38
  5. Step 5: Solve for x
    x = 373,318.38/636.22
  6. Step 6: Final answer
    x = 586.78

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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.