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Finding the Fourth Proportional to 256,353.05, 384,418.91 and 87,889.86

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Solution

The fourth proportional to 256,353.05, 384,418.91 and 87,889.86 is: 131,796.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,353.05 : 384,418.91 = 87,889.86 : x
  2. Step 2: Convert to fraction form
    256,353.05/384,418.91 = 87,889.86/x
  3. Step 3: Cross multiply
    256,353.05x = 384,418.91 × 87,889.86
  4. Step 4: Simplify right side
    256,353.05x = 33,786,524,400.98
  5. Step 5: Solve for x
    x = 33,786,524,400.98/256,353.05
  6. Step 6: Final answer
    x = 131,796.85

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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.