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Finding the Third Proportional to 664 and 1,732

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Solution

The third proportional to 664 and 1,732 is: 4,517.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    664 : 1,732 = 1,732 : x
  2. Step 2: Convert to fraction form
    664/1,732 = 1,732/x
  3. Step 3: Cross multiply
    664x = 1,732 × 1,732
  4. Step 4: Simplify right side
    664x = 2,999,824
  5. Step 5: Solve for x
    x = 2,999,824/664
  6. Step 6: Final answer
    x = 4,517.81

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Why These Related Problems?

These problems maintain the same ratio (2.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.