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Finding the Fourth Proportional to 419,845.86, 629,891.46 and 135,529.74

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Solution

The fourth proportional to 419,845.86, 629,891.46 and 135,529.74 is: 203,334.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,845.86 : 629,891.46 = 135,529.74 : x
  2. Step 2: Convert to fraction form
    419,845.86/629,891.46 = 135,529.74/x
  3. Step 3: Cross multiply
    419,845.86x = 629,891.46 × 135,529.74
  4. Step 4: Simplify right side
    419,845.86x = 85,369,025,802.02
  5. Step 5: Solve for x
    x = 85,369,025,802.02/419,845.86
  6. Step 6: Final answer
    x = 203,334.21

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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.