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Finding the Fourth Proportional to 299.82, 449.76 and 143.58

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Solution

The fourth proportional to 299.82, 449.76 and 143.58 is: 215.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.82 : 449.76 = 143.58 : x
  2. Step 2: Convert to fraction form
    299.82/449.76 = 143.58/x
  3. Step 3: Cross multiply
    299.82x = 449.76 × 143.58
  4. Step 4: Simplify right side
    299.82x = 64,576.54
  5. Step 5: Solve for x
    x = 64,576.54/299.82
  6. Step 6: Final answer
    x = 215.38

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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.