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Finding the Fourth Proportional to 321.35, 443.59 and 216.50

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Solution

The fourth proportional to 321.35, 443.59 and 216.50 is: 298.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.35 : 443.59 = 216.50 : x
  2. Step 2: Convert to fraction form
    321.35/443.59 = 216.50/x
  3. Step 3: Cross multiply
    321.35x = 443.59 × 216.50
  4. Step 4: Simplify right side
    321.35x = 96,034.48
  5. Step 5: Solve for x
    x = 96,034.48/321.35
  6. Step 6: Final answer
    x = 298.85

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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.