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Finding the Fourth Proportional to 299.90, 449.92 and 216.91

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Solution

The fourth proportional to 299.90, 449.92 and 216.91 is: 325.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.90 : 449.92 = 216.91 : x
  2. Step 2: Convert to fraction form
    299.90/449.92 = 216.91/x
  3. Step 3: Cross multiply
    299.90x = 449.92 × 216.91
  4. Step 4: Simplify right side
    299.90x = 97,592.98
  5. Step 5: Solve for x
    x = 97,592.98/299.90
  6. Step 6: Final answer
    x = 325.42

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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.