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Finding the Third Proportional to 713 and 1,107

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Solution

The third proportional to 713 and 1,107 is: 1,718.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    713 : 1,107 = 1,107 : x
  2. Step 2: Convert to fraction form
    713/1,107 = 1,107/x
  3. Step 3: Cross multiply
    713x = 1,107 × 1,107
  4. Step 4: Simplify right side
    713x = 1,225,449
  5. Step 5: Solve for x
    x = 1,225,449/713
  6. Step 6: Final answer
    x = 1,718.72

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.