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Finding the Fourth Proportional to 185.28, 255.36 and 126.72

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Solution

The fourth proportional to 185.28, 255.36 and 126.72 is: 174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.28 : 255.36 = 126.72 : x
  2. Step 2: Convert to fraction form
    185.28/255.36 = 126.72/x
  3. Step 3: Cross multiply
    185.28x = 255.36 × 126.72
  4. Step 4: Simplify right side
    185.28x = 32,359.22
  5. Step 5: Solve for x
    x = 32,359.22/185.28
  6. Step 6: Final answer
    x = 174.65

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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.