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Finding the Fourth Proportional to 365.52, 548.28 and 221.16

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Solution

The fourth proportional to 365.52, 548.28 and 221.16 is: 331.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.52 : 548.28 = 221.16 : x
  2. Step 2: Convert to fraction form
    365.52/548.28 = 221.16/x
  3. Step 3: Cross multiply
    365.52x = 548.28 × 221.16
  4. Step 4: Simplify right side
    365.52x = 121,257.60
  5. Step 5: Solve for x
    x = 121,257.60/365.52
  6. Step 6: Final answer
    x = 331.74

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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.