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Finding the Fourth Proportional to 199.42, 299.05 and 127.19

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Solution

The fourth proportional to 199.42, 299.05 and 127.19 is: 190.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.42 : 299.05 = 127.19 : x
  2. Step 2: Convert to fraction form
    199.42/299.05 = 127.19/x
  3. Step 3: Cross multiply
    199.42x = 299.05 × 127.19
  4. Step 4: Simplify right side
    199.42x = 38,036.17
  5. Step 5: Solve for x
    x = 38,036.17/199.42
  6. Step 6: Final answer
    x = 190.73

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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.