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Finding the Fourth Proportional to 629.71, 944.55 and 399.04

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Solution

The fourth proportional to 629.71, 944.55 and 399.04 is: 598.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.71 : 944.55 = 399.04 : x
  2. Step 2: Convert to fraction form
    629.71/944.55 = 399.04/x
  3. Step 3: Cross multiply
    629.71x = 944.55 × 399.04
  4. Step 4: Simplify right side
    629.71x = 376,910.87
  5. Step 5: Solve for x
    x = 376,910.87/629.71
  6. Step 6: Final answer
    x = 598.55

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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.