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Finding the Fourth Proportional to 299.74, 449.62 and 279.14

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Solution

The fourth proportional to 299.74, 449.62 and 279.14 is: 418.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.74 : 449.62 = 279.14 : x
  2. Step 2: Convert to fraction form
    299.74/449.62 = 279.14/x
  3. Step 3: Cross multiply
    299.74x = 449.62 × 279.14
  4. Step 4: Simplify right side
    299.74x = 125,506.93
  5. Step 5: Solve for x
    x = 125,506.93/299.74
  6. Step 6: Final answer
    x = 418.72

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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.