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Finding the Fourth Proportional to 386,791.50, 580,201.85 and 120,550.98

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Solution

The fourth proportional to 386,791.50, 580,201.85 and 120,550.98 is: 180,831.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,791.50 : 580,201.85 = 120,550.98 : x
  2. Step 2: Convert to fraction form
    386,791.50/580,201.85 = 120,550.98/x
  3. Step 3: Cross multiply
    386,791.50x = 580,201.85 × 120,550.98
  4. Step 4: Simplify right side
    386,791.50x = 69,943,901,012.56
  5. Step 5: Solve for x
    x = 69,943,901,012.56/386,791.50
  6. Step 6: Final answer
    x = 180,831.02

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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.