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Finding the Fourth Proportional to 263,321.16, 395,022.70 and 85,786.86

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Solution

The fourth proportional to 263,321.16, 395,022.70 and 85,786.86 is: 128,693.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,321.16 : 395,022.70 = 85,786.86 : x
  2. Step 2: Convert to fraction form
    263,321.16/395,022.70 = 85,786.86/x
  3. Step 3: Cross multiply
    263,321.16x = 395,022.70 × 85,786.86
  4. Step 4: Simplify right side
    263,321.16x = 33,887,757,061.72
  5. Step 5: Solve for x
    x = 33,887,757,061.72/263,321.16
  6. Step 6: Final answer
    x = 128,693.63

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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.