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Finding the Fourth Proportional to 483,940.60, 725,910.90 and 405,791.80

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Solution

The fourth proportional to 483,940.60, 725,910.90 and 405,791.80 is: 608,687.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,940.60 : 725,910.90 = 405,791.80 : x
  2. Step 2: Convert to fraction form
    483,940.60/725,910.90 = 405,791.80/x
  3. Step 3: Cross multiply
    483,940.60x = 725,910.90 × 405,791.80
  4. Step 4: Simplify right side
    483,940.60x = 294,568,690,750.62
  5. Step 5: Solve for x
    x = 294,568,690,750.62/483,940.60
  6. Step 6: Final answer
    x = 608,687.70

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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.