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Finding the Third Proportional to 478 and 1,252

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Solution

The third proportional to 478 and 1,252 is: 3,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478 : 1,252 = 1,252 : x
  2. Step 2: Convert to fraction form
    478/1,252 = 1,252/x
  3. Step 3: Cross multiply
    478x = 1,252 × 1,252
  4. Step 4: Simplify right side
    478x = 1,567,504
  5. Step 5: Solve for x
    x = 1,567,504/478
  6. Step 6: Final answer
    x = 3,279.30

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These problems maintain the same ratio (2.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.