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Finding the Third Proportional to 1,692 and 4,422

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Solution

The third proportional to 1,692 and 4,422 is: 11,556.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692 : 4,422 = 4,422 : x
  2. Step 2: Convert to fraction form
    1,692/4,422 = 4,422/x
  3. Step 3: Cross multiply
    1,692x = 4,422 × 4,422
  4. Step 4: Simplify right side
    1,692x = 19,554,084
  5. Step 5: Solve for x
    x = 19,554,084/1,692
  6. Step 6: Final answer
    x = 11,556.79

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Why These Related Problems?

These problems maintain the same ratio (2.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.