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Finding the Fourth Proportional to 221.70, 331.27 and 169.34

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Solution

The fourth proportional to 221.70, 331.27 and 169.34 is: 253.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.70 : 331.27 = 169.34 : x
  2. Step 2: Convert to fraction form
    221.70/331.27 = 169.34/x
  3. Step 3: Cross multiply
    221.70x = 331.27 × 169.34
  4. Step 4: Simplify right side
    221.70x = 56,095.17
  5. Step 5: Solve for x
    x = 56,095.17/221.70
  6. Step 6: Final answer
    x = 253.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.