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Finding the Fourth Proportional to 214.14, 321.22 and 181.87

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Solution

The fourth proportional to 214.14, 321.22 and 181.87 is: 272.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.14 : 321.22 = 181.87 : x
  2. Step 2: Convert to fraction form
    214.14/321.22 = 181.87/x
  3. Step 3: Cross multiply
    214.14x = 321.22 × 181.87
  4. Step 4: Simplify right side
    214.14x = 58,419.59
  5. Step 5: Solve for x
    x = 58,419.59/214.14
  6. Step 6: Final answer
    x = 272.81

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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.