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Finding the Fourth Proportional to 629.87, 944.79 and 239.64

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Solution

The fourth proportional to 629.87, 944.79 and 239.64 is: 359.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.87 : 944.79 = 239.64 : x
  2. Step 2: Convert to fraction form
    629.87/944.79 = 239.64/x
  3. Step 3: Cross multiply
    629.87x = 944.79 × 239.64
  4. Step 4: Simplify right side
    629.87x = 226,409.48
  5. Step 5: Solve for x
    x = 226,409.48/629.87
  6. Step 6: Final answer
    x = 359.46

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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.