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Finding the Fourth Proportional to 411,379.56, 616,958.46 and 145,105.48

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Solution

The fourth proportional to 411,379.56, 616,958.46 and 145,105.48 is: 217,619.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,379.56 : 616,958.46 = 145,105.48 : x
  2. Step 2: Convert to fraction form
    411,379.56/616,958.46 = 145,105.48/x
  3. Step 3: Cross multiply
    411,379.56x = 616,958.46 × 145,105.48
  4. Step 4: Simplify right side
    411,379.56x = 89,524,053,478.36
  5. Step 5: Solve for x
    x = 89,524,053,478.36/411,379.56
  6. Step 6: Final answer
    x = 217,619.11

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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.