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Finding the Fourth Proportional to 170.91, 255.15 and 153.60

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Solution

The fourth proportional to 170.91, 255.15 and 153.60 is: 229.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.91 : 255.15 = 153.60 : x
  2. Step 2: Convert to fraction form
    170.91/255.15 = 153.60/x
  3. Step 3: Cross multiply
    170.91x = 255.15 × 153.60
  4. Step 4: Simplify right side
    170.91x = 39,190.08
  5. Step 5: Solve for x
    x = 39,190.08/170.91
  6. Step 6: Final answer
    x = 229.30

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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.