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Finding the Fourth Proportional to 220.37, 303.81 and 161.39

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Solution

The fourth proportional to 220.37, 303.81 and 161.39 is: 222.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.37 : 303.81 = 161.39 : x
  2. Step 2: Convert to fraction form
    220.37/303.81 = 161.39/x
  3. Step 3: Cross multiply
    220.37x = 303.81 × 161.39
  4. Step 4: Simplify right side
    220.37x = 49,031.90
  5. Step 5: Solve for x
    x = 49,031.90/220.37
  6. Step 6: Final answer
    x = 222.50

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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.