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Finding the Fourth Proportional to 220.40, 304.03 and 136.41

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Solution

The fourth proportional to 220.40, 304.03 and 136.41 is: 188.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.40 : 304.03 = 136.41 : x
  2. Step 2: Convert to fraction form
    220.40/304.03 = 136.41/x
  3. Step 3: Cross multiply
    220.40x = 304.03 × 136.41
  4. Step 4: Simplify right side
    220.40x = 41,472.41
  5. Step 5: Solve for x
    x = 41,472.41/220.40
  6. Step 6: Final answer
    x = 188.17

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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.