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Finding the Fourth Proportional to 426.09, 588.17 and 321.49

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Solution

The fourth proportional to 426.09, 588.17 and 321.49 is: 443.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.09 : 588.17 = 321.49 : x
  2. Step 2: Convert to fraction form
    426.09/588.17 = 321.49/x
  3. Step 3: Cross multiply
    426.09x = 588.17 × 321.49
  4. Step 4: Simplify right side
    426.09x = 189,092.31
  5. Step 5: Solve for x
    x = 189,092.31/426.09
  6. Step 6: Final answer
    x = 443.78

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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.