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Finding the Third Proportional to 396,074 and 855,278

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Solution

The third proportional to 396,074 and 855,278 is: 1,846,878.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,074 : 855,278 = 855,278 : x
  2. Step 2: Convert to fraction form
    396,074/855,278 = 855,278/x
  3. Step 3: Cross multiply
    396,074x = 855,278 × 855,278
  4. Step 4: Simplify right side
    396,074x = 731,500,457,284
  5. Step 5: Solve for x
    x = 731,500,457,284/396,074
  6. Step 6: Final answer
    x = 1,846,878.25

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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.