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Finding the Fourth Proportional to 694.32, 958.27 and 399.53

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Solution

The fourth proportional to 694.32, 958.27 and 399.53 is: 551.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.32 : 958.27 = 399.53 : x
  2. Step 2: Convert to fraction form
    694.32/958.27 = 399.53/x
  3. Step 3: Cross multiply
    694.32x = 958.27 × 399.53
  4. Step 4: Simplify right side
    694.32x = 382,850.82
  5. Step 5: Solve for x
    x = 382,850.82/694.32
  6. Step 6: Final answer
    x = 551.41

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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.