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Finding the Fourth Proportional to 220.52, 304.30 and 129.59

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Solution

The fourth proportional to 220.52, 304.30 and 129.59 is: 178.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.52 : 304.30 = 129.59 : x
  2. Step 2: Convert to fraction form
    220.52/304.30 = 129.59/x
  3. Step 3: Cross multiply
    220.52x = 304.30 × 129.59
  4. Step 4: Simplify right side
    220.52x = 39,434.24
  5. Step 5: Solve for x
    x = 39,434.24/220.52
  6. Step 6: Final answer
    x = 178.83

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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.