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Finding the Fourth Proportional to 299,845.20, 449,940.60 and 112,990.80

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Solution

The fourth proportional to 299,845.20, 449,940.60 and 112,990.80 is: 169,551.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,845.20 : 449,940.60 = 112,990.80 : x
  2. Step 2: Convert to fraction form
    299,845.20/449,940.60 = 112,990.80/x
  3. Step 3: Cross multiply
    299,845.20x = 449,940.60 × 112,990.80
  4. Step 4: Simplify right side
    299,845.20x = 50,839,148,346.48
  5. Step 5: Solve for x
    x = 50,839,148,346.48/299,845.20
  6. Step 6: Final answer
    x = 169,551.32

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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.