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Finding the Fourth Proportional to 154.28, 232.61 and 143.84

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Solution

The fourth proportional to 154.28, 232.61 and 143.84 is: 216.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.28 : 232.61 = 143.84 : x
  2. Step 2: Convert to fraction form
    154.28/232.61 = 143.84/x
  3. Step 3: Cross multiply
    154.28x = 232.61 × 143.84
  4. Step 4: Simplify right side
    154.28x = 33,458.62
  5. Step 5: Solve for x
    x = 33,458.62/154.28
  6. Step 6: Final answer
    x = 216.87

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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.