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Finding the Fourth Proportional to 234.20, 349.30 and 214.76

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Solution

The fourth proportional to 234.20, 349.30 and 214.76 is: 320.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.20 : 349.30 = 214.76 : x
  2. Step 2: Convert to fraction form
    234.20/349.30 = 214.76/x
  3. Step 3: Cross multiply
    234.20x = 349.30 × 214.76
  4. Step 4: Simplify right side
    234.20x = 75,015.67
  5. Step 5: Solve for x
    x = 75,015.67/234.20
  6. Step 6: Final answer
    x = 320.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.