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Finding the Fourth Proportional to 267.59, 401.45 and 91.85

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Solution

The fourth proportional to 267.59, 401.45 and 91.85 is: 137.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.59 : 401.45 = 91.85 : x
  2. Step 2: Convert to fraction form
    267.59/401.45 = 91.85/x
  3. Step 3: Cross multiply
    267.59x = 401.45 × 91.85
  4. Step 4: Simplify right side
    267.59x = 36,870.72
  5. Step 5: Solve for x
    x = 36,870.72/267.59
  6. Step 6: Final answer
    x = 137.79

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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.