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Finding the Fourth Proportional to 422.27, 633.85 and 276.31

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Solution

The fourth proportional to 422.27, 633.85 and 276.31 is: 414.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.27 : 633.85 = 276.31 : x
  2. Step 2: Convert to fraction form
    422.27/633.85 = 276.31/x
  3. Step 3: Cross multiply
    422.27x = 633.85 × 276.31
  4. Step 4: Simplify right side
    422.27x = 175,138.40
  5. Step 5: Solve for x
    x = 175,138.40/422.27
  6. Step 6: Final answer
    x = 414.76

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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.