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Finding the Fourth Proportional to 354.92, 533.09 and 218.24

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Solution

The fourth proportional to 354.92, 533.09 and 218.24 is: 327.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.92 : 533.09 = 218.24 : x
  2. Step 2: Convert to fraction form
    354.92/533.09 = 218.24/x
  3. Step 3: Cross multiply
    354.92x = 533.09 × 218.24
  4. Step 4: Simplify right side
    354.92x = 116,339.44
  5. Step 5: Solve for x
    x = 116,339.44/354.92
  6. Step 6: Final answer
    x = 327.79

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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.