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Finding the Third Proportional to 1,692 and 3,712

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Solution

The third proportional to 1,692 and 3,712 is: 8,143.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692 : 3,712 = 3,712 : x
  2. Step 2: Convert to fraction form
    1,692/3,712 = 3,712/x
  3. Step 3: Cross multiply
    1,692x = 3,712 × 3,712
  4. Step 4: Simplify right side
    1,692x = 13,778,944
  5. Step 5: Solve for x
    x = 13,778,944/1,692
  6. Step 6: Final answer
    x = 8,143.58

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.