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Finding the Third Proportional to 378,486 and 827,820

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Solution

The third proportional to 378,486 and 827,820 is: 1,810,597.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,486 : 827,820 = 827,820 : x
  2. Step 2: Convert to fraction form
    378,486/827,820 = 827,820/x
  3. Step 3: Cross multiply
    378,486x = 827,820 × 827,820
  4. Step 4: Simplify right side
    378,486x = 685,285,952,400
  5. Step 5: Solve for x
    x = 685,285,952,400/378,486
  6. Step 6: Final answer
    x = 1,810,597.89

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.