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Finding the Third Proportional to 792 and 1,116

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Solution

The third proportional to 792 and 1,116 is: 1,572.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    792 : 1,116 = 1,116 : x
  2. Step 2: Convert to fraction form
    792/1,116 = 1,116/x
  3. Step 3: Cross multiply
    792x = 1,116 × 1,116
  4. Step 4: Simplify right side
    792x = 1,245,456
  5. Step 5: Solve for x
    x = 1,245,456/792
  6. Step 6: Final answer
    x = 1,572.55

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.