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Finding the Third Proportional to 197.75 and 402

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Solution

The third proportional to 197.75 and 402 is: 817.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.75 : 402 = 402 : x
  2. Step 2: Convert to fraction form
    197.75/402 = 402/x
  3. Step 3: Cross multiply
    197.75x = 402 × 402
  4. Step 4: Simplify right side
    197.75x = 161,604
  5. Step 5: Solve for x
    x = 161,604/197.75
  6. Step 6: Final answer
    x = 817.21

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.