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Finding the Fourth Proportional to 325,788.20, 488,390.70 and 126,042.20

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Solution

The fourth proportional to 325,788.20, 488,390.70 and 126,042.20 is: 188,950.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,788.20 : 488,390.70 = 126,042.20 : x
  2. Step 2: Convert to fraction form
    325,788.20/488,390.70 = 126,042.20/x
  3. Step 3: Cross multiply
    325,788.20x = 488,390.70 × 126,042.20
  4. Step 4: Simplify right side
    325,788.20x = 61,557,838,287.54
  5. Step 5: Solve for x
    x = 61,557,838,287.54/325,788.20
  6. Step 6: Final answer
    x = 188,950.48

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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.