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Finding the Fourth Proportional to 263,190.63, 394,818.75 and 85,649.97

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Solution

The fourth proportional to 263,190.63, 394,818.75 and 85,649.97 is: 128,485.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,190.63 : 394,818.75 = 85,649.97 : x
  2. Step 2: Convert to fraction form
    263,190.63/394,818.75 = 85,649.97/x
  3. Step 3: Cross multiply
    263,190.63x = 394,818.75 × 85,649.97
  4. Step 4: Simplify right side
    263,190.63x = 33,816,214,092.94
  5. Step 5: Solve for x
    x = 33,816,214,092.94/263,190.63
  6. Step 6: Final answer
    x = 128,485.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.