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Finding the Fourth Proportional to 395.38, 593.06 and 138.88

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Solution

The fourth proportional to 395.38, 593.06 and 138.88 is: 208.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.38 : 593.06 = 138.88 : x
  2. Step 2: Convert to fraction form
    395.38/593.06 = 138.88/x
  3. Step 3: Cross multiply
    395.38x = 593.06 × 138.88
  4. Step 4: Simplify right side
    395.38x = 82,361.55
  5. Step 5: Solve for x
    x = 82,361.55/395.38
  6. Step 6: Final answer
    x = 208.31

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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.