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Finding the Fourth Proportional to 267.39, 400.87 and 123.21

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Solution

The fourth proportional to 267.39, 400.87 and 123.21 is: 184.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.39 : 400.87 = 123.21 : x
  2. Step 2: Convert to fraction form
    267.39/400.87 = 123.21/x
  3. Step 3: Cross multiply
    267.39x = 400.87 × 123.21
  4. Step 4: Simplify right side
    267.39x = 49,391.19
  5. Step 5: Solve for x
    x = 49,391.19/267.39
  6. Step 6: Final answer
    x = 184.72

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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.