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Finding the Fourth Proportional to 299,644.20, 449,639.10 and 112,789.80

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Solution

The fourth proportional to 299,644.20, 449,639.10 and 112,789.80 is: 169,249.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,644.20 : 449,639.10 = 112,789.80 : x
  2. Step 2: Convert to fraction form
    299,644.20/449,639.10 = 112,789.80/x
  3. Step 3: Cross multiply
    299,644.20x = 449,639.10 × 112,789.80
  4. Step 4: Simplify right side
    299,644.20x = 50,714,704,161.18
  5. Step 5: Solve for x
    x = 50,714,704,161.18/299,644.20
  6. Step 6: Final answer
    x = 169,249.74

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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.