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Finding the Third Proportional to 243,186 and 388,493

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Solution

The third proportional to 243,186 and 388,493 is: 620,622.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,186 : 388,493 = 388,493 : x
  2. Step 2: Convert to fraction form
    243,186/388,493 = 388,493/x
  3. Step 3: Cross multiply
    243,186x = 388,493 × 388,493
  4. Step 4: Simplify right side
    243,186x = 150,926,811,049
  5. Step 5: Solve for x
    x = 150,926,811,049/243,186
  6. Step 6: Final answer
    x = 620,622.94

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.