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Finding the Fourth Proportional to 515,379.94, 711,200.33 and 285,934.78

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Solution

The fourth proportional to 515,379.94, 711,200.33 and 285,934.78 is: 394,576.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,379.94 : 711,200.33 = 285,934.78 : x
  2. Step 2: Convert to fraction form
    515,379.94/711,200.33 = 285,934.78/x
  3. Step 3: Cross multiply
    515,379.94x = 711,200.33 × 285,934.78
  4. Step 4: Simplify right side
    515,379.94x = 203,356,911,622.12
  5. Step 5: Solve for x
    x = 203,356,911,622.12/515,379.94
  6. Step 6: Final answer
    x = 394,576.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.