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Finding the Fourth Proportional to 216.06, 298.06 and 138.38

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Solution

The fourth proportional to 216.06, 298.06 and 138.38 is: 190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.06 : 298.06 = 138.38 : x
  2. Step 2: Convert to fraction form
    216.06/298.06 = 138.38/x
  3. Step 3: Cross multiply
    216.06x = 298.06 × 138.38
  4. Step 4: Simplify right side
    216.06x = 41,245.54
  5. Step 5: Solve for x
    x = 41,245.54/216.06
  6. Step 6: Final answer
    x = 190.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.