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Finding the Fourth Proportional to 199.62, 298.99 and 118.42

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Solution

The fourth proportional to 199.62, 298.99 and 118.42 is: 177.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.62 : 298.99 = 118.42 : x
  2. Step 2: Convert to fraction form
    199.62/298.99 = 118.42/x
  3. Step 3: Cross multiply
    199.62x = 298.99 × 118.42
  4. Step 4: Simplify right side
    199.62x = 35,406.40
  5. Step 5: Solve for x
    x = 35,406.40/199.62
  6. Step 6: Final answer
    x = 177.37

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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.