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Finding the Fourth Proportional to 395.60, 593.40 and 139.04

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Solution

The fourth proportional to 395.60, 593.40 and 139.04 is: 208.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.60 : 593.40 = 139.04 : x
  2. Step 2: Convert to fraction form
    395.60/593.40 = 139.04/x
  3. Step 3: Cross multiply
    395.60x = 593.40 × 139.04
  4. Step 4: Simplify right side
    395.60x = 82,506.34
  5. Step 5: Solve for x
    x = 82,506.34/395.60
  6. Step 6: Final answer
    x = 208.56

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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.