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Finding the Fourth Proportional to 629.14, 943.86 and 399.50

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Solution

The fourth proportional to 629.14, 943.86 and 399.50 is: 599.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.14 : 943.86 = 399.50 : x
  2. Step 2: Convert to fraction form
    629.14/943.86 = 399.50/x
  3. Step 3: Cross multiply
    629.14x = 943.86 × 399.50
  4. Step 4: Simplify right side
    629.14x = 377,072.07
  5. Step 5: Solve for x
    x = 377,072.07/629.14
  6. Step 6: Final answer
    x = 599.35

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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.