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Finding the Fourth Proportional to 623,666.59, 860,793.42 and 394,078.10

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Solution

The fourth proportional to 623,666.59, 860,793.42 and 394,078.10 is: 543,912.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,666.59 : 860,793.42 = 394,078.10 : x
  2. Step 2: Convert to fraction form
    623,666.59/860,793.42 = 394,078.10/x
  3. Step 3: Cross multiply
    623,666.59x = 860,793.42 × 394,078.10
  4. Step 4: Simplify right side
    623,666.59x = 339,219,835,446.10
  5. Step 5: Solve for x
    x = 339,219,835,446.10/623,666.59
  6. Step 6: Final answer
    x = 543,912.15

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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.