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Finding the Third Proportional to 543,136 and 821,694

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Solution

The third proportional to 543,136 and 821,694 is: 1,243,115.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,136 : 821,694 = 821,694 : x
  2. Step 2: Convert to fraction form
    543,136/821,694 = 821,694/x
  3. Step 3: Cross multiply
    543,136x = 821,694 × 821,694
  4. Step 4: Simplify right side
    543,136x = 675,181,029,636
  5. Step 5: Solve for x
    x = 675,181,029,636/543,136
  6. Step 6: Final answer
    x = 1,243,115.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.