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Finding the Fourth Proportional to 322.47, 483.49 and 212.65

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Solution

The fourth proportional to 322.47, 483.49 and 212.65 is: 318.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.47 : 483.49 = 212.65 : x
  2. Step 2: Convert to fraction form
    322.47/483.49 = 212.65/x
  3. Step 3: Cross multiply
    322.47x = 483.49 × 212.65
  4. Step 4: Simplify right side
    322.47x = 102,814.15
  5. Step 5: Solve for x
    x = 102,814.15/322.47
  6. Step 6: Final answer
    x = 318.83

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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.