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Finding the Third Proportional to 394,172 and 864,645

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Solution

The third proportional to 394,172 and 864,645 is: 1,896,661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,172 : 864,645 = 864,645 : x
  2. Step 2: Convert to fraction form
    394,172/864,645 = 864,645/x
  3. Step 3: Cross multiply
    394,172x = 864,645 × 864,645
  4. Step 4: Simplify right side
    394,172x = 747,610,976,025
  5. Step 5: Solve for x
    x = 747,610,976,025/394,172
  6. Step 6: Final answer
    x = 1,896,661.80

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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.