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Finding the Fourth Proportional to 299.80, 449.64 and 191.44

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Solution

The fourth proportional to 299.80, 449.64 and 191.44 is: 287.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.80 : 449.64 = 191.44 : x
  2. Step 2: Convert to fraction form
    299.80/449.64 = 191.44/x
  3. Step 3: Cross multiply
    299.80x = 449.64 × 191.44
  4. Step 4: Simplify right side
    299.80x = 86,079.08
  5. Step 5: Solve for x
    x = 86,079.08/299.80
  6. Step 6: Final answer
    x = 287.12

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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.