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Finding the Fourth Proportional to 694.37, 958.44 and 399.83

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Solution

The fourth proportional to 694.37, 958.44 and 399.83 is: 551.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.37 : 958.44 = 399.83 : x
  2. Step 2: Convert to fraction form
    694.37/958.44 = 399.83/x
  3. Step 3: Cross multiply
    694.37x = 958.44 × 399.83
  4. Step 4: Simplify right side
    694.37x = 383,213.07
  5. Step 5: Solve for x
    x = 383,213.07/694.37
  6. Step 6: Final answer
    x = 551.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.