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Finding the Fourth Proportional to 522.72, 721.17 and 326.34

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Solution

The fourth proportional to 522.72, 721.17 and 326.34 is: 450.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.72 : 721.17 = 326.34 : x
  2. Step 2: Convert to fraction form
    522.72/721.17 = 326.34/x
  3. Step 3: Cross multiply
    522.72x = 721.17 × 326.34
  4. Step 4: Simplify right side
    522.72x = 235,346.62
  5. Step 5: Solve for x
    x = 235,346.62/522.72
  6. Step 6: Final answer
    x = 450.23

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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.