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Finding the Fourth Proportional to 220.18, 330.32 and 181.20

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Solution

The fourth proportional to 220.18, 330.32 and 181.20 is: 271.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.18 : 330.32 = 181.20 : x
  2. Step 2: Convert to fraction form
    220.18/330.32 = 181.20/x
  3. Step 3: Cross multiply
    220.18x = 330.32 × 181.20
  4. Step 4: Simplify right side
    220.18x = 59,852.33
  5. Step 5: Solve for x
    x = 59,852.33/220.18
  6. Step 6: Final answer
    x = 271.84

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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.