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Finding the Fourth Proportional to 394,169.31, 543,386.78 and 280,795.23

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Solution

The fourth proportional to 394,169.31, 543,386.78 and 280,795.23 is: 387,093.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,169.31 : 543,386.78 = 280,795.23 : x
  2. Step 2: Convert to fraction form
    394,169.31/543,386.78 = 280,795.23/x
  3. Step 3: Cross multiply
    394,169.31x = 543,386.78 × 280,795.23
  4. Step 4: Simplify right side
    394,169.31x = 152,580,415,869.06
  5. Step 5: Solve for x
    x = 152,580,415,869.06/394,169.31
  6. Step 6: Final answer
    x = 387,093.60

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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.