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Finding the Fourth Proportional to 321.44, 479.63 and 301.85

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Solution

The fourth proportional to 321.44, 479.63 and 301.85 is: 450.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.44 : 479.63 = 301.85 : x
  2. Step 2: Convert to fraction form
    321.44/479.63 = 301.85/x
  3. Step 3: Cross multiply
    321.44x = 479.63 × 301.85
  4. Step 4: Simplify right side
    321.44x = 144,773.92
  5. Step 5: Solve for x
    x = 144,773.92/321.44
  6. Step 6: Final answer
    x = 450.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.