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Finding the Fourth Proportional to 629.19, 943.79 and 196.31

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Solution

The fourth proportional to 629.19, 943.79 and 196.31 is: 294.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.19 : 943.79 = 196.31 : x
  2. Step 2: Convert to fraction form
    629.19/943.79 = 196.31/x
  3. Step 3: Cross multiply
    629.19x = 943.79 × 196.31
  4. Step 4: Simplify right side
    629.19x = 185,276.79
  5. Step 5: Solve for x
    x = 185,276.79/629.19
  6. Step 6: Final answer
    x = 294.47

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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.