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Finding the Fourth Proportional to 394.14, 590.71 and 231.42

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Solution

The fourth proportional to 394.14, 590.71 and 231.42 is: 346.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.14 : 590.71 = 231.42 : x
  2. Step 2: Convert to fraction form
    394.14/590.71 = 231.42/x
  3. Step 3: Cross multiply
    394.14x = 590.71 × 231.42
  4. Step 4: Simplify right side
    394.14x = 136,702.11
  5. Step 5: Solve for x
    x = 136,702.11/394.14
  6. Step 6: Final answer
    x = 346.84

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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.