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Finding the Fourth Proportional to 414.13, 620.78 and 170.86

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Solution

The fourth proportional to 414.13, 620.78 and 170.86 is: 256.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.13 : 620.78 = 170.86 : x
  2. Step 2: Convert to fraction form
    414.13/620.78 = 170.86/x
  3. Step 3: Cross multiply
    414.13x = 620.78 × 170.86
  4. Step 4: Simplify right side
    414.13x = 106,063.37
  5. Step 5: Solve for x
    x = 106,063.37/414.13
  6. Step 6: Final answer
    x = 256.11

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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.