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Finding the Fourth Proportional to 490,722.20, 735,564.90 and 279,906.20

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Solution

The fourth proportional to 490,722.20, 735,564.90 and 279,906.20 is: 419,563.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,722.20 : 735,564.90 = 279,906.20 : x
  2. Step 2: Convert to fraction form
    490,722.20/735,564.90 = 279,906.20/x
  3. Step 3: Cross multiply
    490,722.20x = 735,564.90 × 279,906.20
  4. Step 4: Simplify right side
    490,722.20x = 205,889,176,012.38
  5. Step 5: Solve for x
    x = 205,889,176,012.38/490,722.20
  6. Step 6: Final answer
    x = 419,563.61

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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.