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Finding the Fourth Proportional to 220.76, 302.25 and 219.98

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Solution

The fourth proportional to 220.76, 302.25 and 219.98 is: 301.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.76 : 302.25 = 219.98 : x
  2. Step 2: Convert to fraction form
    220.76/302.25 = 219.98/x
  3. Step 3: Cross multiply
    220.76x = 302.25 × 219.98
  4. Step 4: Simplify right side
    220.76x = 66,489.92
  5. Step 5: Solve for x
    x = 66,489.92/220.76
  6. Step 6: Final answer
    x = 301.19

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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.