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Finding the Fourth Proportional to 199.40, 298.82 and 122.18

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Solution

The fourth proportional to 199.40, 298.82 and 122.18 is: 183.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.40 : 298.82 = 122.18 : x
  2. Step 2: Convert to fraction form
    199.40/298.82 = 122.18/x
  3. Step 3: Cross multiply
    199.40x = 298.82 × 122.18
  4. Step 4: Simplify right side
    199.40x = 36,507.72
  5. Step 5: Solve for x
    x = 36,507.72/199.40
  6. Step 6: Final answer
    x = 183.09

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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.