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Finding the Fourth Proportional to 204.13, 305.97 and 139.15

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Solution

The fourth proportional to 204.13, 305.97 and 139.15 is: 208.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.13 : 305.97 = 139.15 : x
  2. Step 2: Convert to fraction form
    204.13/305.97 = 139.15/x
  3. Step 3: Cross multiply
    204.13x = 305.97 × 139.15
  4. Step 4: Simplify right side
    204.13x = 42,575.73
  5. Step 5: Solve for x
    x = 42,575.73/204.13
  6. Step 6: Final answer
    x = 208.57

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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.