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Finding the Third Proportional to 257,865 and 394,206

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Solution

The third proportional to 257,865 and 394,206 is: 602,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,865 : 394,206 = 394,206 : x
  2. Step 2: Convert to fraction form
    257,865/394,206 = 394,206/x
  3. Step 3: Cross multiply
    257,865x = 394,206 × 394,206
  4. Step 4: Simplify right side
    257,865x = 155,398,370,436
  5. Step 5: Solve for x
    x = 155,398,370,436/257,865
  6. Step 6: Final answer
    x = 602,634.60

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.