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Finding the Fourth Proportional to 170.20, 255.60 and 164.80

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Solution

The fourth proportional to 170.20, 255.60 and 164.80 is: 247.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.20 : 255.60 = 164.80 : x
  2. Step 2: Convert to fraction form
    170.20/255.60 = 164.80/x
  3. Step 3: Cross multiply
    170.20x = 255.60 × 164.80
  4. Step 4: Simplify right side
    170.20x = 42,122.88
  5. Step 5: Solve for x
    x = 42,122.88/170.20
  6. Step 6: Final answer
    x = 247.49

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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.