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Finding the Third Proportional to 257,890 and 394,245

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Solution

The third proportional to 257,890 and 394,245 is: 602,695.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,890 : 394,245 = 394,245 : x
  2. Step 2: Convert to fraction form
    257,890/394,245 = 394,245/x
  3. Step 3: Cross multiply
    257,890x = 394,245 × 394,245
  4. Step 4: Simplify right side
    257,890x = 155,429,120,025
  5. Step 5: Solve for x
    x = 155,429,120,025/257,890
  6. Step 6: Final answer
    x = 602,695.41

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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.