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Finding the Fourth Proportional to 199, 298.56 and 107.68

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Solution

The fourth proportional to 199, 298.56 and 107.68 is: 161.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    199 : 298.56 = 107.68 : x
  2. Step 2: Convert to fraction form
    199/298.56 = 107.68/x
  3. Step 3: Cross multiply
    199x = 298.56 × 107.68
  4. Step 4: Simplify right side
    199x = 32,148.94
  5. Step 5: Solve for x
    x = 32,148.94/199
  6. Step 6: Final answer
    x = 161.55

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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.