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Finding the Fourth Proportional to 393.82, 591.16 and 229.47

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Solution

The fourth proportional to 393.82, 591.16 and 229.47 is: 344.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.82 : 591.16 = 229.47 : x
  2. Step 2: Convert to fraction form
    393.82/591.16 = 229.47/x
  3. Step 3: Cross multiply
    393.82x = 591.16 × 229.47
  4. Step 4: Simplify right side
    393.82x = 135,649.38
  5. Step 5: Solve for x
    x = 135,649.38/393.82
  6. Step 6: Final answer
    x = 344.45

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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.