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Finding the Third Proportional to 1,277 and 3,125

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Solution

The third proportional to 1,277 and 3,125 is: 7,647.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277 : 3,125 = 3,125 : x
  2. Step 2: Convert to fraction form
    1,277/3,125 = 3,125/x
  3. Step 3: Cross multiply
    1,277x = 3,125 × 3,125
  4. Step 4: Simplify right side
    1,277x = 9,765,625
  5. Step 5: Solve for x
    x = 9,765,625/1,277
  6. Step 6: Final answer
    x = 7,647.32

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Why These Related Problems?

These problems maintain the same ratio (2.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.