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Finding the Third Proportional to 387,813 and 808,836

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Solution

The third proportional to 387,813 and 808,836 is: 1,686,935.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,813 : 808,836 = 808,836 : x
  2. Step 2: Convert to fraction form
    387,813/808,836 = 808,836/x
  3. Step 3: Cross multiply
    387,813x = 808,836 × 808,836
  4. Step 4: Simplify right side
    387,813x = 654,215,674,896
  5. Step 5: Solve for x
    x = 654,215,674,896/387,813
  6. Step 6: Final answer
    x = 1,686,935.91

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.