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Finding the Fourth Proportional to 378.49, 522.06 and 329.29

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Solution

The fourth proportional to 378.49, 522.06 and 329.29 is: 454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.49 : 522.06 = 329.29 : x
  2. Step 2: Convert to fraction form
    378.49/522.06 = 329.29/x
  3. Step 3: Cross multiply
    378.49x = 522.06 × 329.29
  4. Step 4: Simplify right side
    378.49x = 171,909.14
  5. Step 5: Solve for x
    x = 171,909.14/378.49
  6. Step 6: Final answer
    x = 454.20

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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.