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Finding the Fourth Proportional to 267.78, 401.67 and 75.41

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Solution

The fourth proportional to 267.78, 401.67 and 75.41 is: 113.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.78 : 401.67 = 75.41 : x
  2. Step 2: Convert to fraction form
    267.78/401.67 = 75.41/x
  3. Step 3: Cross multiply
    267.78x = 401.67 × 75.41
  4. Step 4: Simplify right side
    267.78x = 30,289.93
  5. Step 5: Solve for x
    x = 30,289.93/267.78
  6. Step 6: Final answer
    x = 113.12

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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.