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Finding the Fourth Proportional to 394,146.97, 543,922.80 and 212,858.91

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Solution

The fourth proportional to 394,146.97, 543,922.80 and 212,858.91 is: 293,745.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,146.97 : 543,922.80 = 212,858.91 : x
  2. Step 2: Convert to fraction form
    394,146.97/543,922.80 = 212,858.91/x
  3. Step 3: Cross multiply
    394,146.97x = 543,922.80 × 212,858.91
  4. Step 4: Simplify right side
    394,146.97x = 115,778,813,533.93
  5. Step 5: Solve for x
    x = 115,778,813,533.93/394,146.97
  6. Step 6: Final answer
    x = 293,745.29

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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.