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Finding the Fourth Proportional to 439.85, 606.29 and 321.83

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Solution

The fourth proportional to 439.85, 606.29 and 321.83 is: 443.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.85 : 606.29 = 321.83 : x
  2. Step 2: Convert to fraction form
    439.85/606.29 = 321.83/x
  3. Step 3: Cross multiply
    439.85x = 606.29 × 321.83
  4. Step 4: Simplify right side
    439.85x = 195,124.63
  5. Step 5: Solve for x
    x = 195,124.63/439.85
  6. Step 6: Final answer
    x = 443.61

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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.