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Finding the Fourth Proportional to 398,793.96, 550,332.90 and 219,945.96

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Solution

The fourth proportional to 398,793.96, 550,332.90 and 219,945.96 is: 303,523.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,793.96 : 550,332.90 = 219,945.96 : x
  2. Step 2: Convert to fraction form
    398,793.96/550,332.90 = 219,945.96/x
  3. Step 3: Cross multiply
    398,793.96x = 550,332.90 × 219,945.96
  4. Step 4: Simplify right side
    398,793.96x = 121,043,498,010.08
  5. Step 5: Solve for x
    x = 121,043,498,010.08/398,793.96
  6. Step 6: Final answer
    x = 303,523.90

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1.5x scale

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.