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Finding the Fourth Proportional to 636.87, 955.27 and 311.91

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Solution

The fourth proportional to 636.87, 955.27 and 311.91 is: 467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.87 : 955.27 = 311.91 : x
  2. Step 2: Convert to fraction form
    636.87/955.27 = 311.91/x
  3. Step 3: Cross multiply
    636.87x = 955.27 × 311.91
  4. Step 4: Simplify right side
    636.87x = 297,958.27
  5. Step 5: Solve for x
    x = 297,958.27/636.87
  6. Step 6: Final answer
    x = 467.85

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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.