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Finding the Fourth Proportional to 339,194.43, 508,791.65 and 128,831.85

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Solution

The fourth proportional to 339,194.43, 508,791.65 and 128,831.85 is: 193,247.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,194.43 : 508,791.65 = 128,831.85 : x
  2. Step 2: Convert to fraction form
    339,194.43/508,791.65 = 128,831.85/x
  3. Step 3: Cross multiply
    339,194.43x = 508,791.65 × 128,831.85
  4. Step 4: Simplify right side
    339,194.43x = 65,548,568,889.89
  5. Step 5: Solve for x
    x = 65,548,568,889.89/339,194.43
  6. Step 6: Final answer
    x = 193,247.78

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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.