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Finding the Third Proportional to 280,517 and 394,567

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Solution

The third proportional to 280,517 and 394,567 is: 554,986.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,517 : 394,567 = 394,567 : x
  2. Step 2: Convert to fraction form
    280,517/394,567 = 394,567/x
  3. Step 3: Cross multiply
    280,517x = 394,567 × 394,567
  4. Step 4: Simplify right side
    280,517x = 155,683,117,489
  5. Step 5: Solve for x
    x = 155,683,117,489/280,517
  6. Step 6: Final answer
    x = 554,986.39

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.