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Finding the Fourth Proportional to 170.91, 255.16 and 146.54

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Solution

The fourth proportional to 170.91, 255.16 and 146.54 is: 218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.91 : 255.16 = 146.54 : x
  2. Step 2: Convert to fraction form
    170.91/255.16 = 146.54/x
  3. Step 3: Cross multiply
    170.91x = 255.16 × 146.54
  4. Step 4: Simplify right side
    170.91x = 37,391.97
  5. Step 5: Solve for x
    x = 37,391.97/170.91
  6. Step 6: Final answer
    x = 218.78

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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.