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Finding the Fourth Proportional to 321.11, 480.74 and 295.59

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Solution

The fourth proportional to 321.11, 480.74 and 295.59 is: 442.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.11 : 480.74 = 295.59 : x
  2. Step 2: Convert to fraction form
    321.11/480.74 = 295.59/x
  3. Step 3: Cross multiply
    321.11x = 480.74 × 295.59
  4. Step 4: Simplify right side
    321.11x = 142,101.94
  5. Step 5: Solve for x
    x = 142,101.94/321.11
  6. Step 6: Final answer
    x = 442.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.