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Finding the Third Proportional to 397.69 and 876.09

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Solution

The third proportional to 397.69 and 876.09 is: 1,930.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.69 : 876.09 = 876.09 : x
  2. Step 2: Convert to fraction form
    397.69/876.09 = 876.09/x
  3. Step 3: Cross multiply
    397.69x = 876.09 × 876.09
  4. Step 4: Simplify right side
    397.69x = 767,540.26
  5. Step 5: Solve for x
    x = 767,540.26/397.69
  6. Step 6: Final answer
    x = 1,930.01

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These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.