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Finding the Fourth Proportional to 419,940.64, 629,905.49 and 104,400.28

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Solution

The fourth proportional to 419,940.64, 629,905.49 and 104,400.28 is: 156,599.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,940.64 : 629,905.49 = 104,400.28 : x
  2. Step 2: Convert to fraction form
    419,940.64/629,905.49 = 104,400.28/x
  3. Step 3: Cross multiply
    419,940.64x = 629,905.49 × 104,400.28
  4. Step 4: Simplify right side
    419,940.64x = 65,762,309,529.54
  5. Step 5: Solve for x
    x = 65,762,309,529.54/419,940.64
  6. Step 6: Final answer
    x = 156,599.06

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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.