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Finding the Fourth Proportional to 321.09, 443.10 and 190.14

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Solution

The fourth proportional to 321.09, 443.10 and 190.14 is: 262.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.09 : 443.10 = 190.14 : x
  2. Step 2: Convert to fraction form
    321.09/443.10 = 190.14/x
  3. Step 3: Cross multiply
    321.09x = 443.10 × 190.14
  4. Step 4: Simplify right side
    321.09x = 84,251.03
  5. Step 5: Solve for x
    x = 84,251.03/321.09
  6. Step 6: Final answer
    x = 262.39

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Double scale
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1.5x scale

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.