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Finding the Fourth Proportional to 321.07, 443.11 and 190.05

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Solution

The fourth proportional to 321.07, 443.11 and 190.05 is: 262.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.07 : 443.11 = 190.05 : x
  2. Step 2: Convert to fraction form
    321.07/443.11 = 190.05/x
  3. Step 3: Cross multiply
    321.07x = 443.11 × 190.05
  4. Step 4: Simplify right side
    321.07x = 84,213.06
  5. Step 5: Solve for x
    x = 84,213.06/321.07
  6. Step 6: Final answer
    x = 262.29

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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.