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Finding the Fourth Proportional to 414.25, 620.89 and 170.48

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Solution

The fourth proportional to 414.25, 620.89 and 170.48 is: 255.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.25 : 620.89 = 170.48 : x
  2. Step 2: Convert to fraction form
    414.25/620.89 = 170.48/x
  3. Step 3: Cross multiply
    414.25x = 620.89 × 170.48
  4. Step 4: Simplify right side
    414.25x = 105,849.33
  5. Step 5: Solve for x
    x = 105,849.33/414.25
  6. Step 6: Final answer
    x = 255.52

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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.