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Finding the Fourth Proportional to 365.42, 548.22 and 221.24

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Solution

The fourth proportional to 365.42, 548.22 and 221.24 is: 331.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.42 : 548.22 = 221.24 : x
  2. Step 2: Convert to fraction form
    365.42/548.22 = 221.24/x
  3. Step 3: Cross multiply
    365.42x = 548.22 × 221.24
  4. Step 4: Simplify right side
    365.42x = 121,288.19
  5. Step 5: Solve for x
    x = 121,288.19/365.42
  6. Step 6: Final answer
    x = 331.91

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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.