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Finding the Fourth Proportional to 623,665.09, 860,791.35 and 394,076.60

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Solution

The fourth proportional to 623,665.09, 860,791.35 and 394,076.60 is: 543,910.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,665.09 : 860,791.35 = 394,076.60 : x
  2. Step 2: Convert to fraction form
    623,665.09/860,791.35 = 394,076.60/x
  3. Step 3: Cross multiply
    623,665.09x = 860,791.35 × 394,076.60
  4. Step 4: Simplify right side
    623,665.09x = 339,217,728,517.41
  5. Step 5: Solve for x
    x = 339,217,728,517.41/623,665.09
  6. Step 6: Final answer
    x = 543,910.08

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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.