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Finding the Fourth Proportional to 170.30, 255.22 and 137.86

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Solution

The fourth proportional to 170.30, 255.22 and 137.86 is: 206.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.30 : 255.22 = 137.86 : x
  2. Step 2: Convert to fraction form
    170.30/255.22 = 137.86/x
  3. Step 3: Cross multiply
    170.30x = 255.22 × 137.86
  4. Step 4: Simplify right side
    170.30x = 35,183.65
  5. Step 5: Solve for x
    x = 35,183.65/170.30
  6. Step 6: Final answer
    x = 206.60

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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.