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Finding the Third Proportional to 3,289 and 7,215

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Solution

The third proportional to 3,289 and 7,215 is: 15,827.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,289 : 7,215 = 7,215 : x
  2. Step 2: Convert to fraction form
    3,289/7,215 = 7,215/x
  3. Step 3: Cross multiply
    3,289x = 7,215 × 7,215
  4. Step 4: Simplify right side
    3,289x = 52,056,225
  5. Step 5: Solve for x
    x = 52,056,225/3,289
  6. Step 6: Final answer
    x = 15,827.37

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.