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Finding the Third Proportional to 394,640 and 855,808

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Solution

The third proportional to 394,640 and 855,808 is: 1,855,887.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,640 : 855,808 = 855,808 : x
  2. Step 2: Convert to fraction form
    394,640/855,808 = 855,808/x
  3. Step 3: Cross multiply
    394,640x = 855,808 × 855,808
  4. Step 4: Simplify right side
    394,640x = 732,407,332,864
  5. Step 5: Solve for x
    x = 732,407,332,864/394,640
  6. Step 6: Final answer
    x = 1,855,887.22

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.