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Finding the Fourth Proportional to 230.15, 345.22 and 67.84

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Solution

The fourth proportional to 230.15, 345.22 and 67.84 is: 101.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.15 : 345.22 = 67.84 : x
  2. Step 2: Convert to fraction form
    230.15/345.22 = 67.84/x
  3. Step 3: Cross multiply
    230.15x = 345.22 × 67.84
  4. Step 4: Simplify right side
    230.15x = 23,418.69
  5. Step 5: Solve for x
    x = 23,418.69/230.15
  6. Step 6: Final answer
    x = 101.75

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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.