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Finding the Third Proportional to 1,217 and 2,617

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Solution

The third proportional to 1,217 and 2,617 is: 5,627.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217 : 2,617 = 2,617 : x
  2. Step 2: Convert to fraction form
    1,217/2,617 = 2,617/x
  3. Step 3: Cross multiply
    1,217x = 2,617 × 2,617
  4. Step 4: Simplify right side
    1,217x = 6,848,689
  5. Step 5: Solve for x
    x = 6,848,689/1,217
  6. Step 6: Final answer
    x = 5,627.52

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.