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Finding the Third Proportional to 397.97 and 626.06

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Solution

The third proportional to 397.97 and 626.06 is: 984.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.97 : 626.06 = 626.06 : x
  2. Step 2: Convert to fraction form
    397.97/626.06 = 626.06/x
  3. Step 3: Cross multiply
    397.97x = 626.06 × 626.06
  4. Step 4: Simplify right side
    397.97x = 391,954.25
  5. Step 5: Solve for x
    x = 391,954.25/397.97
  6. Step 6: Final answer
    x = 984.89

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.