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Finding the Fourth Proportional to 151.31, 227.05 and 74.28

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Solution

The fourth proportional to 151.31, 227.05 and 74.28 is: 111.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.31 : 227.05 = 74.28 : x
  2. Step 2: Convert to fraction form
    151.31/227.05 = 74.28/x
  3. Step 3: Cross multiply
    151.31x = 227.05 × 74.28
  4. Step 4: Simplify right side
    151.31x = 16,865.40
  5. Step 5: Solve for x
    x = 16,865.40/151.31
  6. Step 6: Final answer
    x = 111.47

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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.