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Finding the Fourth Proportional to 408,338.44, 612,507.54 and 127,877.56

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Solution

The fourth proportional to 408,338.44, 612,507.54 and 127,877.56 is: 191,816.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,338.44 : 612,507.54 = 127,877.56 : x
  2. Step 2: Convert to fraction form
    408,338.44/612,507.54 = 127,877.56/x
  3. Step 3: Cross multiply
    408,338.44x = 612,507.54 × 127,877.56
  4. Step 4: Simplify right side
    408,338.44x = 78,325,969,696.80
  5. Step 5: Solve for x
    x = 78,325,969,696.80/408,338.44
  6. Step 6: Final answer
    x = 191,816.30

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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.