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Finding the Fourth Proportional to 199.18, 298.16 and 127.09

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Solution

The fourth proportional to 199.18, 298.16 and 127.09 is: 190.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.18 : 298.16 = 127.09 : x
  2. Step 2: Convert to fraction form
    199.18/298.16 = 127.09/x
  3. Step 3: Cross multiply
    199.18x = 298.16 × 127.09
  4. Step 4: Simplify right side
    199.18x = 37,891.03
  5. Step 5: Solve for x
    x = 37,891.03/199.18
  6. Step 6: Final answer
    x = 190.24

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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.