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Finding the Fourth Proportional to 394,168.31, 543,385.40 and 280,794.23

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Solution

The fourth proportional to 394,168.31, 543,385.40 and 280,794.23 is: 387,092.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,168.31 : 543,385.40 = 280,794.23 : x
  2. Step 2: Convert to fraction form
    394,168.31/543,385.40 = 280,794.23/x
  3. Step 3: Cross multiply
    394,168.31x = 543,385.40 × 280,794.23
  4. Step 4: Simplify right side
    394,168.31x = 152,579,487,539.05
  5. Step 5: Solve for x
    x = 152,579,487,539.05/394,168.31
  6. Step 6: Final answer
    x = 387,092.22

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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.