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Finding the Third Proportional to 712.13 and 1,143

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Solution

The third proportional to 712.13 and 1,143 is: 1,834.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.13 : 1,143 = 1,143 : x
  2. Step 2: Convert to fraction form
    712.13/1,143 = 1,143/x
  3. Step 3: Cross multiply
    712.13x = 1,143 × 1,143
  4. Step 4: Simplify right side
    712.13x = 1,306,449
  5. Step 5: Solve for x
    x = 1,306,449/712.13
  6. Step 6: Final answer
    x = 1,834.58

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.