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Finding the Fourth Proportional to 321.05, 482.11 and 304.61

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Solution

The fourth proportional to 321.05, 482.11 and 304.61 is: 457.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.05 : 482.11 = 304.61 : x
  2. Step 2: Convert to fraction form
    321.05/482.11 = 304.61/x
  3. Step 3: Cross multiply
    321.05x = 482.11 × 304.61
  4. Step 4: Simplify right side
    321.05x = 146,855.08
  5. Step 5: Solve for x
    x = 146,855.08/321.05
  6. Step 6: Final answer
    x = 457.42

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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.