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Finding the Fourth Proportional to 220.88, 304.81 and 133.55

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Solution

The fourth proportional to 220.88, 304.81 and 133.55 is: 184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.88 : 304.81 = 133.55 : x
  2. Step 2: Convert to fraction form
    220.88/304.81 = 133.55/x
  3. Step 3: Cross multiply
    220.88x = 304.81 × 133.55
  4. Step 4: Simplify right side
    220.88x = 40,707.41
  5. Step 5: Solve for x
    x = 40,707.41/220.88
  6. Step 6: Final answer
    x = 184.30

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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.