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Finding the Fourth Proportional to 287,999.96, 396,987.39 and 197,198.91

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Solution

The fourth proportional to 287,999.96, 396,987.39 and 197,198.91 is: 271,824.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,999.96 : 396,987.39 = 197,198.91 : x
  2. Step 2: Convert to fraction form
    287,999.96/396,987.39 = 197,198.91/x
  3. Step 3: Cross multiply
    287,999.96x = 396,987.39 × 197,198.91
  4. Step 4: Simplify right side
    287,999.96x = 78,285,480,591.74
  5. Step 5: Solve for x
    x = 78,285,480,591.74/287,999.96
  6. Step 6: Final answer
    x = 271,824.63

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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.