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Finding the Fourth Proportional to 511,857.20, 768,016.20 and 245,514.80

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Solution

The fourth proportional to 511,857.20, 768,016.20 and 245,514.80 is: 368,382.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,857.20 : 768,016.20 = 245,514.80 : x
  2. Step 2: Convert to fraction form
    511,857.20/768,016.20 = 245,514.80/x
  3. Step 3: Cross multiply
    511,857.20x = 768,016.20 × 245,514.80
  4. Step 4: Simplify right side
    511,857.20x = 188,559,343,739.76
  5. Step 5: Solve for x
    x = 188,559,343,739.76/511,857.20
  6. Step 6: Final answer
    x = 368,382.71

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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.