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Finding the Third Proportional to 3,561 and 5,321

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Solution

The third proportional to 3,561 and 5,321 is: 7,950.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561 : 5,321 = 5,321 : x
  2. Step 2: Convert to fraction form
    3,561/5,321 = 5,321/x
  3. Step 3: Cross multiply
    3,561x = 5,321 × 5,321
  4. Step 4: Simplify right side
    3,561x = 28,313,041
  5. Step 5: Solve for x
    x = 28,313,041/3,561
  6. Step 6: Final answer
    x = 7,950.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.