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Finding the Fourth Proportional to 351.39, 527.20 and 221.24

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Solution

The fourth proportional to 351.39, 527.20 and 221.24 is: 331.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.39 : 527.20 = 221.24 : x
  2. Step 2: Convert to fraction form
    351.39/527.20 = 221.24/x
  3. Step 3: Cross multiply
    351.39x = 527.20 × 221.24
  4. Step 4: Simplify right side
    351.39x = 116,633.99
  5. Step 5: Solve for x
    x = 116,633.99/351.39
  6. Step 6: Final answer
    x = 331.93

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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.