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Finding the Fourth Proportional to 515,418.80, 773,357.83 and 199,900.31

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Solution

The fourth proportional to 515,418.80, 773,357.83 and 199,900.31 is: 299,939.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,418.80 : 773,357.83 = 199,900.31 : x
  2. Step 2: Convert to fraction form
    515,418.80/773,357.83 = 199,900.31/x
  3. Step 3: Cross multiply
    515,418.80x = 773,357.83 × 199,900.31
  4. Step 4: Simplify right side
    515,418.80x = 154,594,465,591.39
  5. Step 5: Solve for x
    x = 154,594,465,591.39/515,418.80
  6. Step 6: Final answer
    x = 299,939.52

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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.