Home / 305,765.20-422,155.82-198,640.54

Finding the Fourth Proportional to 305,765.20, 422,155.82 and 198,640.54

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Solution

The fourth proportional to 305,765.20, 422,155.82 and 198,640.54 is: 274,253.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,765.20 : 422,155.82 = 198,640.54 : x
  2. Step 2: Convert to fraction form
    305,765.20/422,155.82 = 198,640.54/x
  3. Step 3: Cross multiply
    305,765.20x = 422,155.82 × 198,640.54
  4. Step 4: Simplify right side
    305,765.20x = 83,857,260,048.94
  5. Step 5: Solve for x
    x = 83,857,260,048.94/305,765.20
  6. Step 6: Final answer
    x = 274,253.77

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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.