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Finding the Third Proportional to 3,924 and 5,322.75

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Solution

The third proportional to 3,924 and 5,322.75 is: 7,220.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924 : 5,322.75 = 5,322.75 : x
  2. Step 2: Convert to fraction form
    3,924/5,322.75 = 5,322.75/x
  3. Step 3: Cross multiply
    3,924x = 5,322.75 × 5,322.75
  4. Step 4: Simplify right side
    3,924x = 28,331,667.56
  5. Step 5: Solve for x
    x = 28,331,667.56/3,924
  6. Step 6: Final answer
    x = 7,220.10

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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.