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Finding the Fourth Proportional to 623,679.84, 860,811.71 and 394,091.37

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Solution

The fourth proportional to 623,679.84, 860,811.71 and 394,091.37 is: 543,930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,679.84 : 860,811.71 = 394,091.37 : x
  2. Step 2: Convert to fraction form
    623,679.84/860,811.71 = 394,091.37/x
  3. Step 3: Cross multiply
    623,679.84x = 860,811.71 × 394,091.37
  4. Step 4: Simplify right side
    623,679.84x = 339,238,464,135.49
  5. Step 5: Solve for x
    x = 339,238,464,135.49/623,679.84
  6. Step 6: Final answer
    x = 543,930.46

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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.