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Finding the Fourth Proportional to 234.64, 351.68 and 216.64

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Solution

The fourth proportional to 234.64, 351.68 and 216.64 is: 324.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.64 : 351.68 = 216.64 : x
  2. Step 2: Convert to fraction form
    234.64/351.68 = 216.64/x
  3. Step 3: Cross multiply
    234.64x = 351.68 × 216.64
  4. Step 4: Simplify right side
    234.64x = 76,187.96
  5. Step 5: Solve for x
    x = 76,187.96/234.64
  6. Step 6: Final answer
    x = 324.70

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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.