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Finding the Third Proportional to 393,789 and 858,847

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Solution

The third proportional to 393,789 and 858,847 is: 1,873,130.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,789 : 858,847 = 858,847 : x
  2. Step 2: Convert to fraction form
    393,789/858,847 = 858,847/x
  3. Step 3: Cross multiply
    393,789x = 858,847 × 858,847
  4. Step 4: Simplify right side
    393,789x = 737,618,169,409
  5. Step 5: Solve for x
    x = 737,618,169,409/393,789
  6. Step 6: Final answer
    x = 1,873,130.46

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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.