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Finding the Fourth Proportional to 414.43, 621.17 and 231.46

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Solution

The fourth proportional to 414.43, 621.17 and 231.46 is: 346.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.43 : 621.17 = 231.46 : x
  2. Step 2: Convert to fraction form
    414.43/621.17 = 231.46/x
  3. Step 3: Cross multiply
    414.43x = 621.17 × 231.46
  4. Step 4: Simplify right side
    414.43x = 143,776.01
  5. Step 5: Solve for x
    x = 143,776.01/414.43
  6. Step 6: Final answer
    x = 346.92

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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.