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Finding the Fourth Proportional to 154.58, 231.66 and 141.82

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Solution

The fourth proportional to 154.58, 231.66 and 141.82 is: 212.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.58 : 231.66 = 141.82 : x
  2. Step 2: Convert to fraction form
    154.58/231.66 = 141.82/x
  3. Step 3: Cross multiply
    154.58x = 231.66 × 141.82
  4. Step 4: Simplify right side
    154.58x = 32,853.44
  5. Step 5: Solve for x
    x = 32,853.44/154.58
  6. Step 6: Final answer
    x = 212.54

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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.