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Finding the Third Proportional to 591 and 1,272

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Solution

The third proportional to 591 and 1,272 is: 2,737.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    591 : 1,272 = 1,272 : x
  2. Step 2: Convert to fraction form
    591/1,272 = 1,272/x
  3. Step 3: Cross multiply
    591x = 1,272 × 1,272
  4. Step 4: Simplify right side
    591x = 1,617,984
  5. Step 5: Solve for x
    x = 1,617,984/591
  6. Step 6: Final answer
    x = 2,737.71

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.