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Finding the Fourth Proportional to 234.72, 351.90 and 214.65

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Solution

The fourth proportional to 234.72, 351.90 and 214.65 is: 321.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.72 : 351.90 = 214.65 : x
  2. Step 2: Convert to fraction form
    234.72/351.90 = 214.65/x
  3. Step 3: Cross multiply
    234.72x = 351.90 × 214.65
  4. Step 4: Simplify right side
    234.72x = 75,535.34
  5. Step 5: Solve for x
    x = 75,535.34/234.72
  6. Step 6: Final answer
    x = 321.81

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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.