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Finding the Fourth Proportional to 299.44, 449.28 and 143.32

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Solution

The fourth proportional to 299.44, 449.28 and 143.32 is: 215.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.44 : 449.28 = 143.32 : x
  2. Step 2: Convert to fraction form
    299.44/449.28 = 143.32/x
  3. Step 3: Cross multiply
    299.44x = 449.28 × 143.32
  4. Step 4: Simplify right side
    299.44x = 64,390.81
  5. Step 5: Solve for x
    x = 64,390.81/299.44
  6. Step 6: Final answer
    x = 215.04

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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.