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Finding the Fourth Proportional to 395.44, 593.43 and 138.94

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Solution

The fourth proportional to 395.44, 593.43 and 138.94 is: 208.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.44 : 593.43 = 138.94 : x
  2. Step 2: Convert to fraction form
    395.44/593.43 = 138.94/x
  3. Step 3: Cross multiply
    395.44x = 593.43 × 138.94
  4. Step 4: Simplify right side
    395.44x = 82,451.16
  5. Step 5: Solve for x
    x = 82,451.16/395.44
  6. Step 6: Final answer
    x = 208.50

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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.