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Finding the Fourth Proportional to 267.11, 400.35 and 112.80

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Solution

The fourth proportional to 267.11, 400.35 and 112.80 is: 169.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.11 : 400.35 = 112.80 : x
  2. Step 2: Convert to fraction form
    267.11/400.35 = 112.80/x
  3. Step 3: Cross multiply
    267.11x = 400.35 × 112.80
  4. Step 4: Simplify right side
    267.11x = 45,161.40
  5. Step 5: Solve for x
    x = 45,161.40/267.11
  6. Step 6: Final answer
    x = 169.07

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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.