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Finding the Fourth Proportional to 694.25, 958.17 and 399.50

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Solution

The fourth proportional to 694.25, 958.17 and 399.50 is: 551.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.25 : 958.17 = 399.50 : x
  2. Step 2: Convert to fraction form
    694.25/958.17 = 399.50/x
  3. Step 3: Cross multiply
    694.25x = 958.17 × 399.50
  4. Step 4: Simplify right side
    694.25x = 382,782.13
  5. Step 5: Solve for x
    x = 382,782.13/694.25
  6. Step 6: Final answer
    x = 551.36

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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.