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Finding the Third Proportional to 3,910.78 and 6,243.96

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Solution

The third proportional to 3,910.78 and 6,243.96 is: 9,969.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.78 : 6,243.96 = 6,243.96 : x
  2. Step 2: Convert to fraction form
    3,910.78/6,243.96 = 6,243.96/x
  3. Step 3: Cross multiply
    3,910.78x = 6,243.96 × 6,243.96
  4. Step 4: Simplify right side
    3,910.78x = 38,987,048.19
  5. Step 5: Solve for x
    x = 38,987,048.19/3,910.78
  6. Step 6: Final answer
    x = 9,969.12

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.