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Finding the Fourth Proportional to 490,220.70, 735,331.05 and 279,879.90

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Solution

The fourth proportional to 490,220.70, 735,331.05 and 279,879.90 is: 419,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,220.70 : 735,331.05 = 279,879.90 : x
  2. Step 2: Convert to fraction form
    490,220.70/735,331.05 = 279,879.90/x
  3. Step 3: Cross multiply
    490,220.70x = 735,331.05 × 279,879.90
  4. Step 4: Simplify right side
    490,220.70x = 205,804,380,740.90
  5. Step 5: Solve for x
    x = 205,804,380,740.90/490,220.70
  6. Step 6: Final answer
    x = 419,819.85

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Similar ratio
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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.