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Finding the Fourth Proportional to 681,144.08, 939,978.48 and 394,830.08

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Solution

The fourth proportional to 681,144.08, 939,978.48 and 394,830.08 is: 544,865.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,144.08 : 939,978.48 = 394,830.08 : x
  2. Step 2: Convert to fraction form
    681,144.08/939,978.48 = 394,830.08/x
  3. Step 3: Cross multiply
    681,144.08x = 939,978.48 × 394,830.08
  4. Step 4: Simplify right side
    681,144.08x = 371,131,778,456.68
  5. Step 5: Solve for x
    x = 371,131,778,456.68/681,144.08
  6. Step 6: Final answer
    x = 544,865.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.