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Finding the Fourth Proportional to 267.72, 401.17 and 253.86

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Solution

The fourth proportional to 267.72, 401.17 and 253.86 is: 380.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.72 : 401.17 = 253.86 : x
  2. Step 2: Convert to fraction form
    267.72/401.17 = 253.86/x
  3. Step 3: Cross multiply
    267.72x = 401.17 × 253.86
  4. Step 4: Simplify right side
    267.72x = 101,841.02
  5. Step 5: Solve for x
    x = 101,841.02/267.72
  6. Step 6: Final answer
    x = 380.40

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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.