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Finding the Fourth Proportional to 685,435.73, 945,930.85 and 379,512.11

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Solution

The fourth proportional to 685,435.73, 945,930.85 and 379,512.11 is: 523,743.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,435.73 : 945,930.85 = 379,512.11 : x
  2. Step 2: Convert to fraction form
    685,435.73/945,930.85 = 379,512.11/x
  3. Step 3: Cross multiply
    685,435.73x = 945,930.85 × 379,512.11
  4. Step 4: Simplify right side
    685,435.73x = 358,992,209,604.37
  5. Step 5: Solve for x
    x = 358,992,209,604.37/685,435.73
  6. Step 6: Final answer
    x = 523,743.07

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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.