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Finding the Fourth Proportional to 408,436.70, 612,713.38 and 127,975.82

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Solution

The fourth proportional to 408,436.70, 612,713.38 and 127,975.82 is: 191,982.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,436.70 : 612,713.38 = 127,975.82 : x
  2. Step 2: Convert to fraction form
    408,436.70/612,713.38 = 127,975.82/x
  3. Step 3: Cross multiply
    408,436.70x = 612,713.38 × 127,975.82
  4. Step 4: Simplify right side
    408,436.70x = 78,412,497,230.47
  5. Step 5: Solve for x
    x = 78,412,497,230.47/408,436.70
  6. Step 6: Final answer
    x = 191,982.01

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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.