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Finding the Fourth Proportional to 220.47, 304.24 and 120.88

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Solution

The fourth proportional to 220.47, 304.24 and 120.88 is: 166.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.47 : 304.24 = 120.88 : x
  2. Step 2: Convert to fraction form
    220.47/304.24 = 120.88/x
  3. Step 3: Cross multiply
    220.47x = 304.24 × 120.88
  4. Step 4: Simplify right side
    220.47x = 36,776.87
  5. Step 5: Solve for x
    x = 36,776.87/220.47
  6. Step 6: Final answer
    x = 166.81

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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.