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Finding the Fourth Proportional to 214.34, 321.21 and 137.27

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Solution

The fourth proportional to 214.34, 321.21 and 137.27 is: 205.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.34 : 321.21 = 137.27 : x
  2. Step 2: Convert to fraction form
    214.34/321.21 = 137.27/x
  3. Step 3: Cross multiply
    214.34x = 321.21 × 137.27
  4. Step 4: Simplify right side
    214.34x = 44,093.30
  5. Step 5: Solve for x
    x = 44,093.30/214.34
  6. Step 6: Final answer
    x = 205.72

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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.