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Finding the Third Proportional to 378,688 and 816,398

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Solution

The third proportional to 378,688 and 816,398 is: 1,760,039.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,688 : 816,398 = 816,398 : x
  2. Step 2: Convert to fraction form
    378,688/816,398 = 816,398/x
  3. Step 3: Cross multiply
    378,688x = 816,398 × 816,398
  4. Step 4: Simplify right side
    378,688x = 666,505,694,404
  5. Step 5: Solve for x
    x = 666,505,694,404/378,688
  6. Step 6: Final answer
    x = 1,760,039.12

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.