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Finding the Third Proportional to 3,285 and 7,211.25

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Solution

The third proportional to 3,285 and 7,211.25 is: 15,830.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,285 : 7,211.25 = 7,211.25 : x
  2. Step 2: Convert to fraction form
    3,285/7,211.25 = 7,211.25/x
  3. Step 3: Cross multiply
    3,285x = 7,211.25 × 7,211.25
  4. Step 4: Simplify right side
    3,285x = 52,002,126.56
  5. Step 5: Solve for x
    x = 52,002,126.56/3,285
  6. Step 6: Final answer
    x = 15,830.18

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Why These Related Problems?

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