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Finding the Fourth Proportional to 416.31, 574.51 and 229.79

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Solution

The fourth proportional to 416.31, 574.51 and 229.79 is: 317.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.31 : 574.51 = 229.79 : x
  2. Step 2: Convert to fraction form
    416.31/574.51 = 229.79/x
  3. Step 3: Cross multiply
    416.31x = 574.51 × 229.79
  4. Step 4: Simplify right side
    416.31x = 132,016.65
  5. Step 5: Solve for x
    x = 132,016.65/416.31
  6. Step 6: Final answer
    x = 317.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.