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Finding the Fourth Proportional to 220.22, 328.62 and 191.06

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Solution

The fourth proportional to 220.22, 328.62 and 191.06 is: 285.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.22 : 328.62 = 191.06 : x
  2. Step 2: Convert to fraction form
    220.22/328.62 = 191.06/x
  3. Step 3: Cross multiply
    220.22x = 328.62 × 191.06
  4. Step 4: Simplify right side
    220.22x = 62,786.44
  5. Step 5: Solve for x
    x = 62,786.44/220.22
  6. Step 6: Final answer
    x = 285.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.