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Finding the Fourth Proportional to 281.39, 422.69 and 267.48

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Solution

The fourth proportional to 281.39, 422.69 and 267.48 is: 401.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.39 : 422.69 = 267.48 : x
  2. Step 2: Convert to fraction form
    281.39/422.69 = 267.48/x
  3. Step 3: Cross multiply
    281.39x = 422.69 × 267.48
  4. Step 4: Simplify right side
    281.39x = 113,059.78
  5. Step 5: Solve for x
    x = 113,059.78/281.39
  6. Step 6: Final answer
    x = 401.80

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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.