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Finding the Fourth Proportional to 378,331.41, 522,100.86 and 208,571.61

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Solution

The fourth proportional to 378,331.41, 522,100.86 and 208,571.61 is: 287,830.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,331.41 : 522,100.86 = 208,571.61 : x
  2. Step 2: Convert to fraction form
    378,331.41/522,100.86 = 208,571.61/x
  3. Step 3: Cross multiply
    378,331.41x = 522,100.86 × 208,571.61
  4. Step 4: Simplify right side
    378,331.41x = 108,895,416,952.59
  5. Step 5: Solve for x
    x = 108,895,416,952.59/378,331.41
  6. Step 6: Final answer
    x = 287,830.76

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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.