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Finding the Fourth Proportional to 512,313.60, 768,604.80 and 196,780.80

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Solution

The fourth proportional to 512,313.60, 768,604.80 and 196,780.80 is: 295,222.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,313.60 : 768,604.80 = 196,780.80 : x
  2. Step 2: Convert to fraction form
    512,313.60/768,604.80 = 196,780.80/x
  3. Step 3: Cross multiply
    512,313.60x = 768,604.80 × 196,780.80
  4. Step 4: Simplify right side
    512,313.60x = 151,246,667,427.84
  5. Step 5: Solve for x
    x = 151,246,667,427.84/512,313.60
  6. Step 6: Final answer
    x = 295,222.82

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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.