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Finding the Fourth Proportional to 355.72, 533.49 and 218.29

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Solution

The fourth proportional to 355.72, 533.49 and 218.29 is: 327.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.72 : 533.49 = 218.29 : x
  2. Step 2: Convert to fraction form
    355.72/533.49 = 218.29/x
  3. Step 3: Cross multiply
    355.72x = 533.49 × 218.29
  4. Step 4: Simplify right side
    355.72x = 116,455.53
  5. Step 5: Solve for x
    x = 116,455.53/355.72
  6. Step 6: Final answer
    x = 327.38

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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.