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Finding the Third Proportional to 3,555 and 5,721

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Solution

The third proportional to 3,555 and 5,721 is: 9,206.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,555 : 5,721 = 5,721 : x
  2. Step 2: Convert to fraction form
    3,555/5,721 = 5,721/x
  3. Step 3: Cross multiply
    3,555x = 5,721 × 5,721
  4. Step 4: Simplify right side
    3,555x = 32,729,841
  5. Step 5: Solve for x
    x = 32,729,841/3,555
  6. Step 6: Final answer
    x = 9,206.71

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.