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Finding the Fourth Proportional to 321.09, 443.18 and 268.58

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Solution

The fourth proportional to 321.09, 443.18 and 268.58 is: 370.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.09 : 443.18 = 268.58 : x
  2. Step 2: Convert to fraction form
    321.09/443.18 = 268.58/x
  3. Step 3: Cross multiply
    321.09x = 443.18 × 268.58
  4. Step 4: Simplify right side
    321.09x = 119,029.28
  5. Step 5: Solve for x
    x = 119,029.28/321.09
  6. Step 6: Final answer
    x = 370.70

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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.