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Finding the Third Proportional to 857.63 and 1,872.38

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Solution

The third proportional to 857.63 and 1,872.38 is: 4,087.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.63 : 1,872.38 = 1,872.38 : x
  2. Step 2: Convert to fraction form
    857.63/1,872.38 = 1,872.38/x
  3. Step 3: Cross multiply
    857.63x = 1,872.38 × 1,872.38
  4. Step 4: Simplify right side
    857.63x = 3,505,788.14
  5. Step 5: Solve for x
    x = 3,505,788.14/857.63
  6. Step 6: Final answer
    x = 4,087.79

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.