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Finding the Third Proportional to 172.97 and 364.92

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Solution

The third proportional to 172.97 and 364.92 is: 769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.97 : 364.92 = 364.92 : x
  2. Step 2: Convert to fraction form
    172.97/364.92 = 364.92/x
  3. Step 3: Cross multiply
    172.97x = 364.92 × 364.92
  4. Step 4: Simplify right side
    172.97x = 133,167.97
  5. Step 5: Solve for x
    x = 133,167.97/172.97
  6. Step 6: Final answer
    x = 769.90

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.