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Finding the Fourth Proportional to 321.49, 443.50 and 190.47

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Solution

The fourth proportional to 321.49, 443.50 and 190.47 is: 262.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.49 : 443.50 = 190.47 : x
  2. Step 2: Convert to fraction form
    321.49/443.50 = 190.47/x
  3. Step 3: Cross multiply
    321.49x = 443.50 × 190.47
  4. Step 4: Simplify right side
    321.49x = 84,473.45
  5. Step 5: Solve for x
    x = 84,473.45/321.49
  6. Step 6: Final answer
    x = 262.76

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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.