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Finding the Fourth Proportional to 151.40, 227.19 and 74.41

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Solution

The fourth proportional to 151.40, 227.19 and 74.41 is: 111.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.40 : 227.19 = 74.41 : x
  2. Step 2: Convert to fraction form
    151.40/227.19 = 74.41/x
  3. Step 3: Cross multiply
    151.40x = 227.19 × 74.41
  4. Step 4: Simplify right side
    151.40x = 16,905.21
  5. Step 5: Solve for x
    x = 16,905.21/151.40
  6. Step 6: Final answer
    x = 111.66

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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.