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Finding the Fourth Proportional to 394,063.04, 543,618.22 and 378,785.63

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Solution

The fourth proportional to 394,063.04, 543,618.22 and 378,785.63 is: 522,542.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,063.04 : 543,618.22 = 378,785.63 : x
  2. Step 2: Convert to fraction form
    394,063.04/543,618.22 = 378,785.63/x
  3. Step 3: Cross multiply
    394,063.04x = 543,618.22 × 378,785.63
  4. Step 4: Simplify right side
    394,063.04x = 205,914,769,942.18
  5. Step 5: Solve for x
    x = 205,914,769,942.18/394,063.04
  6. Step 6: Final answer
    x = 522,542.71

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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.