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Finding the Fourth Proportional to 519,907.20, 717,087.78 and 328,736.40

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Solution

The fourth proportional to 519,907.20, 717,087.78 and 328,736.40 is: 453,413.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,907.20 : 717,087.78 = 328,736.40 : x
  2. Step 2: Convert to fraction form
    519,907.20/717,087.78 = 328,736.40/x
  3. Step 3: Cross multiply
    519,907.20x = 717,087.78 × 328,736.40
  4. Step 4: Simplify right side
    519,907.20x = 235,732,855,281.19
  5. Step 5: Solve for x
    x = 235,732,855,281.19/519,907.20
  6. Step 6: Final answer
    x = 453,413.33

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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.