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Finding the Third Proportional to 103.92 and 207.42

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Solution

The third proportional to 103.92 and 207.42 is: 414.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.92 : 207.42 = 207.42 : x
  2. Step 2: Convert to fraction form
    103.92/207.42 = 207.42/x
  3. Step 3: Cross multiply
    103.92x = 207.42 × 207.42
  4. Step 4: Simplify right side
    103.92x = 43,023.83
  5. Step 5: Solve for x
    x = 43,023.83/103.92
  6. Step 6: Final answer
    x = 414.00

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Why These Related Problems?

These problems maintain the same ratio (2.00) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.