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Finding the Third Proportional to 393,549 and 869,790

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Solution

The third proportional to 393,549 and 869,790 is: 1,922,339.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,549 : 869,790 = 869,790 : x
  2. Step 2: Convert to fraction form
    393,549/869,790 = 869,790/x
  3. Step 3: Cross multiply
    393,549x = 869,790 × 869,790
  4. Step 4: Simplify right side
    393,549x = 756,534,644,100
  5. Step 5: Solve for x
    x = 756,534,644,100/393,549
  6. Step 6: Final answer
    x = 1,922,339.13

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.