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Finding the Third Proportional to 3,988.50 and 5,861

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Solution

The third proportional to 3,988.50 and 5,861 is: 8,612.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.50 : 5,861 = 5,861 : x
  2. Step 2: Convert to fraction form
    3,988.50/5,861 = 5,861/x
  3. Step 3: Cross multiply
    3,988.50x = 5,861 × 5,861
  4. Step 4: Simplify right side
    3,988.50x = 34,351,321
  5. Step 5: Solve for x
    x = 34,351,321/3,988.50
  6. Step 6: Final answer
    x = 8,612.59

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.