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Finding the Fourth Proportional to 221.76, 304.26 and 219.72

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Solution

The fourth proportional to 221.76, 304.26 and 219.72 is: 301.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.76 : 304.26 = 219.72 : x
  2. Step 2: Convert to fraction form
    221.76/304.26 = 219.72/x
  3. Step 3: Cross multiply
    221.76x = 304.26 × 219.72
  4. Step 4: Simplify right side
    221.76x = 66,852.01
  5. Step 5: Solve for x
    x = 66,852.01/221.76
  6. Step 6: Final answer
    x = 301.46

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.