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Finding the Third Proportional to 387,822 and 808,854

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Solution

The third proportional to 387,822 and 808,854 is: 1,686,971.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,822 : 808,854 = 808,854 : x
  2. Step 2: Convert to fraction form
    387,822/808,854 = 808,854/x
  3. Step 3: Cross multiply
    387,822x = 808,854 × 808,854
  4. Step 4: Simplify right side
    387,822x = 654,244,793,316
  5. Step 5: Solve for x
    x = 654,244,793,316/387,822
  6. Step 6: Final answer
    x = 1,686,971.84

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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.