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Finding the Fourth Proportional to 321.01, 443.10 and 217.57

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Solution

The fourth proportional to 321.01, 443.10 and 217.57 is: 300.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.01 : 443.10 = 217.57 : x
  2. Step 2: Convert to fraction form
    321.01/443.10 = 217.57/x
  3. Step 3: Cross multiply
    321.01x = 443.10 × 217.57
  4. Step 4: Simplify right side
    321.01x = 96,405.27
  5. Step 5: Solve for x
    x = 96,405.27/321.01
  6. Step 6: Final answer
    x = 300.32

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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.