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Finding the Fourth Proportional to 299.50, 449.79 and 288.43

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Solution

The fourth proportional to 299.50, 449.79 and 288.43 is: 433.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.50 : 449.79 = 288.43 : x
  2. Step 2: Convert to fraction form
    299.50/449.79 = 288.43/x
  3. Step 3: Cross multiply
    299.50x = 449.79 × 288.43
  4. Step 4: Simplify right side
    299.50x = 129,730.72
  5. Step 5: Solve for x
    x = 129,730.72/299.50
  6. Step 6: Final answer
    x = 433.16

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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.