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Finding the Third Proportional to 670 and 1,192

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Solution

The third proportional to 670 and 1,192 is: 2,120.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    670 : 1,192 = 1,192 : x
  2. Step 2: Convert to fraction form
    670/1,192 = 1,192/x
  3. Step 3: Cross multiply
    670x = 1,192 × 1,192
  4. Step 4: Simplify right side
    670x = 1,420,864
  5. Step 5: Solve for x
    x = 1,420,864/670
  6. Step 6: Final answer
    x = 2,120.69

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.