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Finding the Third Proportional to 3,924 and 5,330

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Solution

The third proportional to 3,924 and 5,330 is: 7,239.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924 : 5,330 = 5,330 : x
  2. Step 2: Convert to fraction form
    3,924/5,330 = 5,330/x
  3. Step 3: Cross multiply
    3,924x = 5,330 × 5,330
  4. Step 4: Simplify right side
    3,924x = 28,408,900
  5. Step 5: Solve for x
    x = 28,408,900/3,924
  6. Step 6: Final answer
    x = 7,239.78

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.