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Finding the Fourth Proportional to 235.30, 350.95 and 231.20

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Solution

The fourth proportional to 235.30, 350.95 and 231.20 is: 344.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.30 : 350.95 = 231.20 : x
  2. Step 2: Convert to fraction form
    235.30/350.95 = 231.20/x
  3. Step 3: Cross multiply
    235.30x = 350.95 × 231.20
  4. Step 4: Simplify right side
    235.30x = 81,139.64
  5. Step 5: Solve for x
    x = 81,139.64/235.30
  6. Step 6: Final answer
    x = 344.83

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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.