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Finding the Fourth Proportional to 301.58, 449.20 and 287.54

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Solution

The fourth proportional to 301.58, 449.20 and 287.54 is: 428.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.58 : 449.20 = 287.54 : x
  2. Step 2: Convert to fraction form
    301.58/449.20 = 287.54/x
  3. Step 3: Cross multiply
    301.58x = 449.20 × 287.54
  4. Step 4: Simplify right side
    301.58x = 129,162.97
  5. Step 5: Solve for x
    x = 129,162.97/301.58
  6. Step 6: Final answer
    x = 428.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.