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Finding the Fourth Proportional to 494,468.40, 682,379.82 and 279,640.56

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Solution

The fourth proportional to 494,468.40, 682,379.82 and 279,640.56 is: 385,911.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,468.40 : 682,379.82 = 279,640.56 : x
  2. Step 2: Convert to fraction form
    494,468.40/682,379.82 = 279,640.56/x
  3. Step 3: Cross multiply
    494,468.40x = 682,379.82 × 279,640.56
  4. Step 4: Simplify right side
    494,468.40x = 190,821,074,997.50
  5. Step 5: Solve for x
    x = 190,821,074,997.50/494,468.40
  6. Step 6: Final answer
    x = 385,911.57

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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.