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Finding the Fourth Proportional to 394.11, 590.76 and 239.63

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Solution

The fourth proportional to 394.11, 590.76 and 239.63 is: 359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.11 : 590.76 = 239.63 : x
  2. Step 2: Convert to fraction form
    394.11/590.76 = 239.63/x
  3. Step 3: Cross multiply
    394.11x = 590.76 × 239.63
  4. Step 4: Simplify right side
    394.11x = 141,560.87
  5. Step 5: Solve for x
    x = 141,560.87/394.11
  6. Step 6: Final answer
    x = 359.19

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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.