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Finding the Fourth Proportional to 339.57, 468.42 and 215.18

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Solution

The fourth proportional to 339.57, 468.42 and 215.18 is: 296.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.57 : 468.42 = 215.18 : x
  2. Step 2: Convert to fraction form
    339.57/468.42 = 215.18/x
  3. Step 3: Cross multiply
    339.57x = 468.42 × 215.18
  4. Step 4: Simplify right side
    339.57x = 100,793.54
  5. Step 5: Solve for x
    x = 100,793.54/339.57
  6. Step 6: Final answer
    x = 296.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.