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Finding the Fourth Proportional to 414.32, 620.82 and 219.32

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Solution

The fourth proportional to 414.32, 620.82 and 219.32 is: 328.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.32 : 620.82 = 219.32 : x
  2. Step 2: Convert to fraction form
    414.32/620.82 = 219.32/x
  3. Step 3: Cross multiply
    414.32x = 620.82 × 219.32
  4. Step 4: Simplify right side
    414.32x = 136,155.14
  5. Step 5: Solve for x
    x = 136,155.14/414.32
  6. Step 6: Final answer
    x = 328.63

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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.