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Finding the Third Proportional to 3,091.78 and 6,331.78

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Solution

The third proportional to 3,091.78 and 6,331.78 is: 12,967.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,091.78 : 6,331.78 = 6,331.78 : x
  2. Step 2: Convert to fraction form
    3,091.78/6,331.78 = 6,331.78/x
  3. Step 3: Cross multiply
    3,091.78x = 6,331.78 × 6,331.78
  4. Step 4: Simplify right side
    3,091.78x = 40,091,453.80
  5. Step 5: Solve for x
    x = 40,091,453.80/3,091.78
  6. Step 6: Final answer
    x = 12,967.11

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.