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Finding the Fourth Proportional to 395.60, 593.24 and 139.12

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Solution

The fourth proportional to 395.60, 593.24 and 139.12 is: 208.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.60 : 593.24 = 139.12 : x
  2. Step 2: Convert to fraction form
    395.60/593.24 = 139.12/x
  3. Step 3: Cross multiply
    395.60x = 593.24 × 139.12
  4. Step 4: Simplify right side
    395.60x = 82,531.55
  5. Step 5: Solve for x
    x = 82,531.55/395.60
  6. Step 6: Final answer
    x = 208.62

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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.