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Finding the Fourth Proportional to 151.20, 227.79 and 143.10

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Solution

The fourth proportional to 151.20, 227.79 and 143.10 is: 215.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.20 : 227.79 = 143.10 : x
  2. Step 2: Convert to fraction form
    151.20/227.79 = 143.10/x
  3. Step 3: Cross multiply
    151.20x = 227.79 × 143.10
  4. Step 4: Simplify right side
    151.20x = 32,596.75
  5. Step 5: Solve for x
    x = 32,596.75/151.20
  6. Step 6: Final answer
    x = 215.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.