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Finding the Fourth Proportional to 299.63, 449.15 and 145.56

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Solution

The fourth proportional to 299.63, 449.15 and 145.56 is: 218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.63 : 449.15 = 145.56 : x
  2. Step 2: Convert to fraction form
    299.63/449.15 = 145.56/x
  3. Step 3: Cross multiply
    299.63x = 449.15 × 145.56
  4. Step 4: Simplify right side
    299.63x = 65,379.23
  5. Step 5: Solve for x
    x = 65,379.23/299.63
  6. Step 6: Final answer
    x = 218.20

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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.