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Finding the Third Proportional to 3,318.50 and 7,223

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Solution

The third proportional to 3,318.50 and 7,223 is: 15,721.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.50 : 7,223 = 7,223 : x
  2. Step 2: Convert to fraction form
    3,318.50/7,223 = 7,223/x
  3. Step 3: Cross multiply
    3,318.50x = 7,223 × 7,223
  4. Step 4: Simplify right side
    3,318.50x = 52,171,729
  5. Step 5: Solve for x
    x = 52,171,729/3,318.50
  6. Step 6: Final answer
    x = 15,721.48

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.