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Finding the Fourth Proportional to 629.36, 944.49 and 398.42

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Solution

The fourth proportional to 629.36, 944.49 and 398.42 is: 597.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.36 : 944.49 = 398.42 : x
  2. Step 2: Convert to fraction form
    629.36/944.49 = 398.42/x
  3. Step 3: Cross multiply
    629.36x = 944.49 × 398.42
  4. Step 4: Simplify right side
    629.36x = 376,303.71
  5. Step 5: Solve for x
    x = 376,303.71/629.36
  6. Step 6: Final answer
    x = 597.91

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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.