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Finding the Fourth Proportional to 231.14, 345.25 and 194.69

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Solution

The fourth proportional to 231.14, 345.25 and 194.69 is: 290.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.14 : 345.25 = 194.69 : x
  2. Step 2: Convert to fraction form
    231.14/345.25 = 194.69/x
  3. Step 3: Cross multiply
    231.14x = 345.25 × 194.69
  4. Step 4: Simplify right side
    231.14x = 67,216.72
  5. Step 5: Solve for x
    x = 67,216.72/231.14
  6. Step 6: Final answer
    x = 290.81

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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.