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Finding the Third Proportional to 221.38 and 267.75

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Solution

The third proportional to 221.38 and 267.75 is: 323.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.38 : 267.75 = 267.75 : x
  2. Step 2: Convert to fraction form
    221.38/267.75 = 267.75/x
  3. Step 3: Cross multiply
    221.38x = 267.75 × 267.75
  4. Step 4: Simplify right side
    221.38x = 71,690.06
  5. Step 5: Solve for x
    x = 71,690.06/221.38
  6. Step 6: Final answer
    x = 323.84

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.