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Finding the Fourth Proportional to 439.99, 606.48 and 321.97

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Solution

The fourth proportional to 439.99, 606.48 and 321.97 is: 443.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.99 : 606.48 = 321.97 : x
  2. Step 2: Convert to fraction form
    439.99/606.48 = 321.97/x
  3. Step 3: Cross multiply
    439.99x = 606.48 × 321.97
  4. Step 4: Simplify right side
    439.99x = 195,270.33
  5. Step 5: Solve for x
    x = 195,270.33/439.99
  6. Step 6: Final answer
    x = 443.81

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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.