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Finding the Fourth Proportional to 221.03, 304.97 and 212.27

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Solution

The fourth proportional to 221.03, 304.97 and 212.27 is: 292.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.03 : 304.97 = 212.27 : x
  2. Step 2: Convert to fraction form
    221.03/304.97 = 212.27/x
  3. Step 3: Cross multiply
    221.03x = 304.97 × 212.27
  4. Step 4: Simplify right side
    221.03x = 64,737.08
  5. Step 5: Solve for x
    x = 64,737.08/221.03
  6. Step 6: Final answer
    x = 292.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.