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Finding the Fourth Proportional to 299.59, 449.43 and 145.49

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Solution

The fourth proportional to 299.59, 449.43 and 145.49 is: 218.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.59 : 449.43 = 145.49 : x
  2. Step 2: Convert to fraction form
    299.59/449.43 = 145.49/x
  3. Step 3: Cross multiply
    299.59x = 449.43 × 145.49
  4. Step 4: Simplify right side
    299.59x = 65,387.57
  5. Step 5: Solve for x
    x = 65,387.57/299.59
  6. Step 6: Final answer
    x = 218.26

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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.