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Finding the Third Proportional to 267.38 and 393.38

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Solution

The third proportional to 267.38 and 393.38 is: 578.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.38 : 393.38 = 393.38 : x
  2. Step 2: Convert to fraction form
    267.38/393.38 = 393.38/x
  3. Step 3: Cross multiply
    267.38x = 393.38 × 393.38
  4. Step 4: Simplify right side
    267.38x = 154,743.89
  5. Step 5: Solve for x
    x = 154,743.89/267.38
  6. Step 6: Final answer
    x = 578.75

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.