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Finding the Fourth Proportional to 263,393.21, 395,049.72 and 85,899.94

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Solution

The fourth proportional to 263,393.21, 395,049.72 and 85,899.94 is: 128,836.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,393.21 : 395,049.72 = 85,899.94 : x
  2. Step 2: Convert to fraction form
    263,393.21/395,049.72 = 85,899.94/x
  3. Step 3: Cross multiply
    263,393.21x = 395,049.72 × 85,899.94
  4. Step 4: Simplify right side
    263,393.21x = 33,934,746,579.52
  5. Step 5: Solve for x
    x = 33,934,746,579.52/263,393.21
  6. Step 6: Final answer
    x = 128,836.83

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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.