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Finding the Fourth Proportional to 182.76, 274.22 and 128.76

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Solution

The fourth proportional to 182.76, 274.22 and 128.76 is: 193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.76 : 274.22 = 128.76 : x
  2. Step 2: Convert to fraction form
    182.76/274.22 = 128.76/x
  3. Step 3: Cross multiply
    182.76x = 274.22 × 128.76
  4. Step 4: Simplify right side
    182.76x = 35,308.57
  5. Step 5: Solve for x
    x = 35,308.57/182.76
  6. Step 6: Final answer
    x = 193.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.