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Finding the Third Proportional to 3,215 and 7,617

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Solution

The third proportional to 3,215 and 7,617 is: 18,046.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215 : 7,617 = 7,617 : x
  2. Step 2: Convert to fraction form
    3,215/7,617 = 7,617/x
  3. Step 3: Cross multiply
    3,215x = 7,617 × 7,617
  4. Step 4: Simplify right side
    3,215x = 58,018,689
  5. Step 5: Solve for x
    x = 58,018,689/3,215
  6. Step 6: Final answer
    x = 18,046.25

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.