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Finding the Fourth Proportional to 378,845.60, 567,879.60 and 220,992.80

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Solution

The fourth proportional to 378,845.60, 567,879.60 and 220,992.80 is: 331,262.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,845.60 : 567,879.60 = 220,992.80 : x
  2. Step 2: Convert to fraction form
    378,845.60/567,879.60 = 220,992.80/x
  3. Step 3: Cross multiply
    378,845.60x = 567,879.60 × 220,992.80
  4. Step 4: Simplify right side
    378,845.60x = 125,497,302,866.88
  5. Step 5: Solve for x
    x = 125,497,302,866.88/378,845.60
  6. Step 6: Final answer
    x = 331,262.40

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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.