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Finding the Fourth Proportional to 221.92, 332.16 and 214.24

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Solution

The fourth proportional to 221.92, 332.16 and 214.24 is: 320.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.92 : 332.16 = 214.24 : x
  2. Step 2: Convert to fraction form
    221.92/332.16 = 214.24/x
  3. Step 3: Cross multiply
    221.92x = 332.16 × 214.24
  4. Step 4: Simplify right side
    221.92x = 71,161.96
  5. Step 5: Solve for x
    x = 71,161.96/221.92
  6. Step 6: Final answer
    x = 320.66

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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.