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Finding the Fourth Proportional to 235.22, 351.14 and 218.30

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Solution

The fourth proportional to 235.22, 351.14 and 218.30 is: 325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.22 : 351.14 = 218.30 : x
  2. Step 2: Convert to fraction form
    235.22/351.14 = 218.30/x
  3. Step 3: Cross multiply
    235.22x = 351.14 × 218.30
  4. Step 4: Simplify right side
    235.22x = 76,651.01
  5. Step 5: Solve for x
    x = 76,651.01/235.22
  6. Step 6: Final answer
    x = 325.88

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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.