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Finding the Fourth Proportional to 170.87, 255.21 and 154.59

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Solution

The fourth proportional to 170.87, 255.21 and 154.59 is: 230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.87 : 255.21 = 154.59 : x
  2. Step 2: Convert to fraction form
    170.87/255.21 = 154.59/x
  3. Step 3: Cross multiply
    170.87x = 255.21 × 154.59
  4. Step 4: Simplify right side
    170.87x = 39,452.91
  5. Step 5: Solve for x
    x = 39,452.91/170.87
  6. Step 6: Final answer
    x = 230.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.