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Finding the Third Proportional to 4,202 and 5,607

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Solution

The third proportional to 4,202 and 5,607 is: 7,481.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,202 : 5,607 = 5,607 : x
  2. Step 2: Convert to fraction form
    4,202/5,607 = 5,607/x
  3. Step 3: Cross multiply
    4,202x = 5,607 × 5,607
  4. Step 4: Simplify right side
    4,202x = 31,438,449
  5. Step 5: Solve for x
    x = 31,438,449/4,202
  6. Step 6: Final answer
    x = 7,481.78

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.