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Finding the Third Proportional to 2,485 and 5,561

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Solution

The third proportional to 2,485 and 5,561 is: 12,444.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485 : 5,561 = 5,561 : x
  2. Step 2: Convert to fraction form
    2,485/5,561 = 5,561/x
  3. Step 3: Cross multiply
    2,485x = 5,561 × 5,561
  4. Step 4: Simplify right side
    2,485x = 30,924,721
  5. Step 5: Solve for x
    x = 30,924,721/2,485
  6. Step 6: Final answer
    x = 12,444.56

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Why These Related Problems?

These problems maintain the same ratio (2.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.