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Finding the Fourth Proportional to 267.76, 401.37 and 256.15

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Solution

The fourth proportional to 267.76, 401.37 and 256.15 is: 383.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.76 : 401.37 = 256.15 : x
  2. Step 2: Convert to fraction form
    267.76/401.37 = 256.15/x
  3. Step 3: Cross multiply
    267.76x = 401.37 × 256.15
  4. Step 4: Simplify right side
    267.76x = 102,810.93
  5. Step 5: Solve for x
    x = 102,810.93/267.76
  6. Step 6: Final answer
    x = 383.97

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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.