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Finding the Fourth Proportional to 199.15, 298.79 and 170.53

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Solution

The fourth proportional to 199.15, 298.79 and 170.53 is: 255.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.15 : 298.79 = 170.53 : x
  2. Step 2: Convert to fraction form
    199.15/298.79 = 170.53/x
  3. Step 3: Cross multiply
    199.15x = 298.79 × 170.53
  4. Step 4: Simplify right side
    199.15x = 50,950.31
  5. Step 5: Solve for x
    x = 50,950.31/199.15
  6. Step 6: Final answer
    x = 255.85

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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.