Home / 521,815.20-782,139.60-222,244.80

Finding the Fourth Proportional to 521,815.20, 782,139.60 and 222,244.80

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Solution

The fourth proportional to 521,815.20, 782,139.60 and 222,244.80 is: 333,118.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,815.20 : 782,139.60 = 222,244.80 : x
  2. Step 2: Convert to fraction form
    521,815.20/782,139.60 = 222,244.80/x
  3. Step 3: Cross multiply
    521,815.20x = 782,139.60 × 222,244.80
  4. Step 4: Simplify right side
    521,815.20x = 173,826,458,974.08
  5. Step 5: Solve for x
    x = 173,826,458,974.08/521,815.20
  6. Step 6: Final answer
    x = 333,118.81

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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.