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Finding the Fourth Proportional to 424.29, 634.77 and 321.87

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Solution

The fourth proportional to 424.29, 634.77 and 321.87 is: 481.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.29 : 634.77 = 321.87 : x
  2. Step 2: Convert to fraction form
    424.29/634.77 = 321.87/x
  3. Step 3: Cross multiply
    424.29x = 634.77 × 321.87
  4. Step 4: Simplify right side
    424.29x = 204,313.42
  5. Step 5: Solve for x
    x = 204,313.42/424.29
  6. Step 6: Final answer
    x = 481.54

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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.