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Finding the Fourth Proportional to 694.08, 958.02 and 399.44

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Solution

The fourth proportional to 694.08, 958.02 and 399.44 is: 551.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.08 : 958.02 = 399.44 : x
  2. Step 2: Convert to fraction form
    694.08/958.02 = 399.44/x
  3. Step 3: Cross multiply
    694.08x = 958.02 × 399.44
  4. Step 4: Simplify right side
    694.08x = 382,671.51
  5. Step 5: Solve for x
    x = 382,671.51/694.08
  6. Step 6: Final answer
    x = 551.34

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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.