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Finding the Fourth Proportional to 321.38, 443.50 and 211.04

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Solution

The fourth proportional to 321.38, 443.50 and 211.04 is: 291.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.38 : 443.50 = 211.04 : x
  2. Step 2: Convert to fraction form
    321.38/443.50 = 211.04/x
  3. Step 3: Cross multiply
    321.38x = 443.50 × 211.04
  4. Step 4: Simplify right side
    321.38x = 93,596.24
  5. Step 5: Solve for x
    x = 93,596.24/321.38
  6. Step 6: Final answer
    x = 291.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.