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Finding the Third Proportional to 1,685 and 3,857

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Solution

The third proportional to 1,685 and 3,857 is: 8,828.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685 : 3,857 = 3,857 : x
  2. Step 2: Convert to fraction form
    1,685/3,857 = 3,857/x
  3. Step 3: Cross multiply
    1,685x = 3,857 × 3,857
  4. Step 4: Simplify right side
    1,685x = 14,876,449
  5. Step 5: Solve for x
    x = 14,876,449/1,685
  6. Step 6: Final answer
    x = 8,828.75

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Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.