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Finding the Fourth Proportional to 220.46, 330.82 and 188.06

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Solution

The fourth proportional to 220.46, 330.82 and 188.06 is: 282.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.46 : 330.82 = 188.06 : x
  2. Step 2: Convert to fraction form
    220.46/330.82 = 188.06/x
  3. Step 3: Cross multiply
    220.46x = 330.82 × 188.06
  4. Step 4: Simplify right side
    220.46x = 62,211.88
  5. Step 5: Solve for x
    x = 62,211.88/220.46
  6. Step 6: Final answer
    x = 282.20

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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.