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Finding the Fourth Proportional to 483.29, 724.29 and 321.09

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Solution

The fourth proportional to 483.29, 724.29 and 321.09 is: 481.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.29 : 724.29 = 321.09 : x
  2. Step 2: Convert to fraction form
    483.29/724.29 = 321.09/x
  3. Step 3: Cross multiply
    483.29x = 724.29 × 321.09
  4. Step 4: Simplify right side
    483.29x = 232,562.28
  5. Step 5: Solve for x
    x = 232,562.28/483.29
  6. Step 6: Final answer
    x = 481.21

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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.