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Finding the Fourth Proportional to 402.82, 603.21 and 321.82

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Solution

The fourth proportional to 402.82, 603.21 and 321.82 is: 481.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.82 : 603.21 = 321.82 : x
  2. Step 2: Convert to fraction form
    402.82/603.21 = 321.82/x
  3. Step 3: Cross multiply
    402.82x = 603.21 × 321.82
  4. Step 4: Simplify right side
    402.82x = 194,125.04
  5. Step 5: Solve for x
    x = 194,125.04/402.82
  6. Step 6: Final answer
    x = 481.92

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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.