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Finding the Fourth Proportional to 339,596.75, 509,629.05 and 139,917.44

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Solution

The fourth proportional to 339,596.75, 509,629.05 and 139,917.44 is: 209,972.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,596.75 : 509,629.05 = 139,917.44 : x
  2. Step 2: Convert to fraction form
    339,596.75/509,629.05 = 139,917.44/x
  3. Step 3: Cross multiply
    339,596.75x = 509,629.05 × 139,917.44
  4. Step 4: Simplify right side
    339,596.75x = 71,305,993,299.70
  5. Step 5: Solve for x
    x = 71,305,993,299.70/339,596.75
  6. Step 6: Final answer
    x = 209,972.54

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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.