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Finding the Third Proportional to 3,924 and 6,311

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Solution

The third proportional to 3,924 and 6,311 is: 10,150.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924 : 6,311 = 6,311 : x
  2. Step 2: Convert to fraction form
    3,924/6,311 = 6,311/x
  3. Step 3: Cross multiply
    3,924x = 6,311 × 6,311
  4. Step 4: Simplify right side
    3,924x = 39,828,721
  5. Step 5: Solve for x
    x = 39,828,721/3,924
  6. Step 6: Final answer
    x = 10,150.03

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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.