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Finding the Fourth Proportional to 234.30, 353.19 and 218.30

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Solution

The fourth proportional to 234.30, 353.19 and 218.30 is: 329.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.30 : 353.19 = 218.30 : x
  2. Step 2: Convert to fraction form
    234.30/353.19 = 218.30/x
  3. Step 3: Cross multiply
    234.30x = 353.19 × 218.30
  4. Step 4: Simplify right side
    234.30x = 77,100.29
  5. Step 5: Solve for x
    x = 77,100.29/234.30
  6. Step 6: Final answer
    x = 329.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.