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Finding the Fourth Proportional to 281.86, 422.51 and 144.97

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Solution

The fourth proportional to 281.86, 422.51 and 144.97 is: 217.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.86 : 422.51 = 144.97 : x
  2. Step 2: Convert to fraction form
    281.86/422.51 = 144.97/x
  3. Step 3: Cross multiply
    281.86x = 422.51 × 144.97
  4. Step 4: Simplify right side
    281.86x = 61,251.27
  5. Step 5: Solve for x
    x = 61,251.27/281.86
  6. Step 6: Final answer
    x = 217.31

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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.