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Finding the Fourth Proportional to 220.39, 304.18 and 136.42

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Solution

The fourth proportional to 220.39, 304.18 and 136.42 is: 188.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.39 : 304.18 = 136.42 : x
  2. Step 2: Convert to fraction form
    220.39/304.18 = 136.42/x
  3. Step 3: Cross multiply
    220.39x = 304.18 × 136.42
  4. Step 4: Simplify right side
    220.39x = 41,494.79
  5. Step 5: Solve for x
    x = 41,494.79/220.39
  6. Step 6: Final answer
    x = 188.28

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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.