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Finding the Fourth Proportional to 321.03, 443.41 and 277.90

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Solution

The fourth proportional to 321.03, 443.41 and 277.90 is: 383.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.03 : 443.41 = 277.90 : x
  2. Step 2: Convert to fraction form
    321.03/443.41 = 277.90/x
  3. Step 3: Cross multiply
    321.03x = 443.41 × 277.90
  4. Step 4: Simplify right side
    321.03x = 123,221.84
  5. Step 5: Solve for x
    x = 123,221.84/321.03
  6. Step 6: Final answer
    x = 383.83

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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.