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Finding the Fourth Proportional to 299.41, 449.48 and 285.56

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Solution

The fourth proportional to 299.41, 449.48 and 285.56 is: 428.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.41 : 449.48 = 285.56 : x
  2. Step 2: Convert to fraction form
    299.41/449.48 = 285.56/x
  3. Step 3: Cross multiply
    299.41x = 449.48 × 285.56
  4. Step 4: Simplify right side
    299.41x = 128,351.98
  5. Step 5: Solve for x
    x = 128,351.98/299.41
  6. Step 6: Final answer
    x = 428.69

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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.