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Finding the Fourth Proportional to 414.64, 621.96 and 222.64

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Solution

The fourth proportional to 414.64, 621.96 and 222.64 is: 333.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.64 : 621.96 = 222.64 : x
  2. Step 2: Convert to fraction form
    414.64/621.96 = 222.64/x
  3. Step 3: Cross multiply
    414.64x = 621.96 × 222.64
  4. Step 4: Simplify right side
    414.64x = 138,473.17
  5. Step 5: Solve for x
    x = 138,473.17/414.64
  6. Step 6: Final answer
    x = 333.96

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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.