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Finding the Fourth Proportional to 629.44, 863.68 and 613.12

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Solution

The fourth proportional to 629.44, 863.68 and 613.12 is: 841.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.44 : 863.68 = 613.12 : x
  2. Step 2: Convert to fraction form
    629.44/863.68 = 613.12/x
  3. Step 3: Cross multiply
    629.44x = 863.68 × 613.12
  4. Step 4: Simplify right side
    629.44x = 529,539.48
  5. Step 5: Solve for x
    x = 529,539.48/629.44
  6. Step 6: Final answer
    x = 841.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.