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Finding the Fourth Proportional to 220.11, 303.85 and 190.08

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Solution

The fourth proportional to 220.11, 303.85 and 190.08 is: 262.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.11 : 303.85 = 190.08 : x
  2. Step 2: Convert to fraction form
    220.11/303.85 = 190.08/x
  3. Step 3: Cross multiply
    220.11x = 303.85 × 190.08
  4. Step 4: Simplify right side
    220.11x = 57,755.33
  5. Step 5: Solve for x
    x = 57,755.33/220.11
  6. Step 6: Final answer
    x = 262.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.