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Finding the Fourth Proportional to 275.72, 412.97 and 221.34

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Solution

The fourth proportional to 275.72, 412.97 and 221.34 is: 331.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.72 : 412.97 = 221.34 : x
  2. Step 2: Convert to fraction form
    275.72/412.97 = 221.34/x
  3. Step 3: Cross multiply
    275.72x = 412.97 × 221.34
  4. Step 4: Simplify right side
    275.72x = 91,407.22
  5. Step 5: Solve for x
    x = 91,407.22/275.72
  6. Step 6: Final answer
    x = 331.53

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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.