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Finding the Fourth Proportional to 287,181.70, 430,936.58 and 198,498.85

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Solution

The fourth proportional to 287,181.70, 430,936.58 and 198,498.85 is: 297,861.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,181.70 : 430,936.58 = 198,498.85 : x
  2. Step 2: Convert to fraction form
    287,181.70/430,936.58 = 198,498.85/x
  3. Step 3: Cross multiply
    287,181.70x = 430,936.58 × 198,498.85
  4. Step 4: Simplify right side
    287,181.70x = 85,540,414,560.44
  5. Step 5: Solve for x
    x = 85,540,414,560.44/287,181.70
  6. Step 6: Final answer
    x = 297,861.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.