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Finding the Fourth Proportional to 321,919.60, 482,879.40 and 188,863.60

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Solution

The fourth proportional to 321,919.60, 482,879.40 and 188,863.60 is: 283,295.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,919.60 : 482,879.40 = 188,863.60 : x
  2. Step 2: Convert to fraction form
    321,919.60/482,879.40 = 188,863.60/x
  3. Step 3: Cross multiply
    321,919.60x = 482,879.40 × 188,863.60
  4. Step 4: Simplify right side
    321,919.60x = 91,198,341,849.84
  5. Step 5: Solve for x
    x = 91,198,341,849.84/321,919.60
  6. Step 6: Final answer
    x = 283,295.40

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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.