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Finding the Fourth Proportional to 321.24, 482.52 and 211.89

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Solution

The fourth proportional to 321.24, 482.52 and 211.89 is: 318.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.24 : 482.52 = 211.89 : x
  2. Step 2: Convert to fraction form
    321.24/482.52 = 211.89/x
  3. Step 3: Cross multiply
    321.24x = 482.52 × 211.89
  4. Step 4: Simplify right side
    321.24x = 102,241.16
  5. Step 5: Solve for x
    x = 102,241.16/321.24
  6. Step 6: Final answer
    x = 318.27

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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.