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Finding the Fourth Proportional to 151.74, 227.47 and 128.75

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Solution

The fourth proportional to 151.74, 227.47 and 128.75 is: 193.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.74 : 227.47 = 128.75 : x
  2. Step 2: Convert to fraction form
    151.74/227.47 = 128.75/x
  3. Step 3: Cross multiply
    151.74x = 227.47 × 128.75
  4. Step 4: Simplify right side
    151.74x = 29,286.25
  5. Step 5: Solve for x
    x = 29,286.25/151.74
  6. Step 6: Final answer
    x = 193.01

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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.