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Finding the Fourth Proportional to 226.68, 339.90 and 87.84

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Solution

The fourth proportional to 226.68, 339.90 and 87.84 is: 131.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.68 : 339.90 = 87.84 : x
  2. Step 2: Convert to fraction form
    226.68/339.90 = 87.84/x
  3. Step 3: Cross multiply
    226.68x = 339.90 × 87.84
  4. Step 4: Simplify right side
    226.68x = 29,856.82
  5. Step 5: Solve for x
    x = 29,856.82/226.68
  6. Step 6: Final answer
    x = 131.71

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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.