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Finding the Fourth Proportional to 681,117.82, 939,942.81 and 394,803.97

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Solution

The fourth proportional to 681,117.82, 939,942.81 and 394,803.97 is: 544,829.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,117.82 : 939,942.81 = 394,803.97 : x
  2. Step 2: Convert to fraction form
    681,117.82/939,942.81 = 394,803.97/x
  3. Step 3: Cross multiply
    681,117.82x = 939,942.81 × 394,803.97
  4. Step 4: Simplify right side
    681,117.82x = 371,093,152,960.96
  5. Step 5: Solve for x
    x = 371,093,152,960.96/681,117.82
  6. Step 6: Final answer
    x = 544,829.61

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1.5x scale

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.