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Finding the Fourth Proportional to 154.66, 213.40 and 131.44

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Solution

The fourth proportional to 154.66, 213.40 and 131.44 is: 181.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.66 : 213.40 = 131.44 : x
  2. Step 2: Convert to fraction form
    154.66/213.40 = 131.44/x
  3. Step 3: Cross multiply
    154.66x = 213.40 × 131.44
  4. Step 4: Simplify right side
    154.66x = 28,049.30
  5. Step 5: Solve for x
    x = 28,049.30/154.66
  6. Step 6: Final answer
    x = 181.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.