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Finding the Fourth Proportional to 151.90, 227.47 and 138.22

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Solution

The fourth proportional to 151.90, 227.47 and 138.22 is: 206.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.90 : 227.47 = 138.22 : x
  2. Step 2: Convert to fraction form
    151.90/227.47 = 138.22/x
  3. Step 3: Cross multiply
    151.90x = 227.47 × 138.22
  4. Step 4: Simplify right side
    151.90x = 31,440.90
  5. Step 5: Solve for x
    x = 31,440.90/151.90
  6. Step 6: Final answer
    x = 206.98

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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.