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Finding the Fourth Proportional to 321.39, 479.03 and 296.73

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Solution

The fourth proportional to 321.39, 479.03 and 296.73 is: 442.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.39 : 479.03 = 296.73 : x
  2. Step 2: Convert to fraction form
    321.39/479.03 = 296.73/x
  3. Step 3: Cross multiply
    321.39x = 479.03 × 296.73
  4. Step 4: Simplify right side
    321.39x = 142,141.09
  5. Step 5: Solve for x
    x = 142,141.09/321.39
  6. Step 6: Final answer
    x = 442.27

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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.