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Finding the Fourth Proportional to 395.96, 594.22 and 139.46

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Solution

The fourth proportional to 395.96, 594.22 and 139.46 is: 209.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.96 : 594.22 = 139.46 : x
  2. Step 2: Convert to fraction form
    395.96/594.22 = 139.46/x
  3. Step 3: Cross multiply
    395.96x = 594.22 × 139.46
  4. Step 4: Simplify right side
    395.96x = 82,869.92
  5. Step 5: Solve for x
    x = 82,869.92/395.96
  6. Step 6: Final answer
    x = 209.29

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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.