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Finding the Fourth Proportional to 281.62, 422.34 and 144.74

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Solution

The fourth proportional to 281.62, 422.34 and 144.74 is: 217.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.62 : 422.34 = 144.74 : x
  2. Step 2: Convert to fraction form
    281.62/422.34 = 144.74/x
  3. Step 3: Cross multiply
    281.62x = 422.34 × 144.74
  4. Step 4: Simplify right side
    281.62x = 61,129.49
  5. Step 5: Solve for x
    x = 61,129.49/281.62
  6. Step 6: Final answer
    x = 217.06

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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.