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Finding the Fourth Proportional to 267.76, 401.44 and 171.36

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Solution

The fourth proportional to 267.76, 401.44 and 171.36 is: 256.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.76 : 401.44 = 171.36 : x
  2. Step 2: Convert to fraction form
    267.76/401.44 = 171.36/x
  3. Step 3: Cross multiply
    267.76x = 401.44 × 171.36
  4. Step 4: Simplify right side
    267.76x = 68,790.76
  5. Step 5: Solve for x
    x = 68,790.76/267.76
  6. Step 6: Final answer
    x = 256.91

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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.