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Finding the Fourth Proportional to 694.45, 1,042.17 and 329.32

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Solution

The fourth proportional to 694.45, 1,042.17 and 329.32 is: 494.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.45 : 1,042.17 = 329.32 : x
  2. Step 2: Convert to fraction form
    694.45/1,042.17 = 329.32/x
  3. Step 3: Cross multiply
    694.45x = 1,042.17 × 329.32
  4. Step 4: Simplify right side
    694.45x = 343,207.42
  5. Step 5: Solve for x
    x = 343,207.42/694.45
  6. Step 6: Final answer
    x = 494.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.