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Finding the Fourth Proportional to 220.40, 303.86 and 161.33

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Solution

The fourth proportional to 220.40, 303.86 and 161.33 is: 222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.40 : 303.86 = 161.33 : x
  2. Step 2: Convert to fraction form
    220.40/303.86 = 161.33/x
  3. Step 3: Cross multiply
    220.40x = 303.86 × 161.33
  4. Step 4: Simplify right side
    220.40x = 49,019.41
  5. Step 5: Solve for x
    x = 49,019.41/220.40
  6. Step 6: Final answer
    x = 222.42

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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.