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Finding the Fourth Proportional to 267.25, 400.87 and 74.87

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Solution

The fourth proportional to 267.25, 400.87 and 74.87 is: 112.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.25 : 400.87 = 74.87 : x
  2. Step 2: Convert to fraction form
    267.25/400.87 = 74.87/x
  3. Step 3: Cross multiply
    267.25x = 400.87 × 74.87
  4. Step 4: Simplify right side
    267.25x = 30,013.14
  5. Step 5: Solve for x
    x = 30,013.14/267.25
  6. Step 6: Final answer
    x = 112.31

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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.