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Finding the Third Proportional to 3,219.75 and 6,861.38

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Solution

The third proportional to 3,219.75 and 6,861.38 is: 14,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.75 : 6,861.38 = 6,861.38 : x
  2. Step 2: Convert to fraction form
    3,219.75/6,861.38 = 6,861.38/x
  3. Step 3: Cross multiply
    3,219.75x = 6,861.38 × 6,861.38
  4. Step 4: Simplify right side
    3,219.75x = 47,078,466.89
  5. Step 5: Solve for x
    x = 47,078,466.89/3,219.75
  6. Step 6: Final answer
    x = 14,621.78

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.