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Finding the Fourth Proportional to 511,861.20, 768,022.20 and 245,518.80

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Solution

The fourth proportional to 511,861.20, 768,022.20 and 245,518.80 is: 368,388.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,861.20 : 768,022.20 = 245,518.80 : x
  2. Step 2: Convert to fraction form
    511,861.20/768,022.20 = 245,518.80/x
  3. Step 3: Cross multiply
    511,861.20x = 768,022.20 × 245,518.80
  4. Step 4: Simplify right side
    511,861.20x = 188,563,888,917.36
  5. Step 5: Solve for x
    x = 188,563,888,917.36/511,861.20
  6. Step 6: Final answer
    x = 368,388.71

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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.