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Finding the Fourth Proportional to 416.45, 574.70 and 239.42

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Solution

The fourth proportional to 416.45, 574.70 and 239.42 is: 330.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.45 : 574.70 = 239.42 : x
  2. Step 2: Convert to fraction form
    416.45/574.70 = 239.42/x
  3. Step 3: Cross multiply
    416.45x = 574.70 × 239.42
  4. Step 4: Simplify right side
    416.45x = 137,590.60
  5. Step 5: Solve for x
    x = 137,590.60/416.45
  6. Step 6: Final answer
    x = 330.39

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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.