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Finding the Fourth Proportional to 623,665.59, 860,792.04 and 394,077.11

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Solution

The fourth proportional to 623,665.59, 860,792.04 and 394,077.11 is: 543,910.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,665.59 : 860,792.04 = 394,077.11 : x
  2. Step 2: Convert to fraction form
    623,665.59/860,792.04 = 394,077.11/x
  3. Step 3: Cross multiply
    623,665.59x = 860,792.04 × 394,077.11
  4. Step 4: Simplify right side
    623,665.59x = 339,218,435,130.24
  5. Step 5: Solve for x
    x = 339,218,435,130.24/623,665.59
  6. Step 6: Final answer
    x = 543,910.78

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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.