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Finding the Third Proportional to 857 and 1,847

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Solution

The third proportional to 857 and 1,847 is: 3,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    857 : 1,847 = 1,847 : x
  2. Step 2: Convert to fraction form
    857/1,847 = 1,847/x
  3. Step 3: Cross multiply
    857x = 1,847 × 1,847
  4. Step 4: Simplify right side
    857x = 3,411,409
  5. Step 5: Solve for x
    x = 3,411,409/857
  6. Step 6: Final answer
    x = 3,980.64

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.