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Finding the Third Proportional to 394,209 and 864,720

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Solution

The third proportional to 394,209 and 864,720 is: 1,896,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,209 : 864,720 = 864,720 : x
  2. Step 2: Convert to fraction form
    394,209/864,720 = 864,720/x
  3. Step 3: Cross multiply
    394,209x = 864,720 × 864,720
  4. Step 4: Simplify right side
    394,209x = 747,740,678,400
  5. Step 5: Solve for x
    x = 747,740,678,400/394,209
  6. Step 6: Final answer
    x = 1,896,812.80

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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.