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Finding the Fourth Proportional to 299.66, 449.01 and 218.36

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Solution

The fourth proportional to 299.66, 449.01 and 218.36 is: 327.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.66 : 449.01 = 218.36 : x
  2. Step 2: Convert to fraction form
    299.66/449.01 = 218.36/x
  3. Step 3: Cross multiply
    299.66x = 449.01 × 218.36
  4. Step 4: Simplify right side
    299.66x = 98,045.82
  5. Step 5: Solve for x
    x = 98,045.82/299.66
  6. Step 6: Final answer
    x = 327.19

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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.