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Finding the Fourth Proportional to 322.33, 443.70 and 278.22

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Solution

The fourth proportional to 322.33, 443.70 and 278.22 is: 382.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.33 : 443.70 = 278.22 : x
  2. Step 2: Convert to fraction form
    322.33/443.70 = 278.22/x
  3. Step 3: Cross multiply
    322.33x = 443.70 × 278.22
  4. Step 4: Simplify right side
    322.33x = 123,446.21
  5. Step 5: Solve for x
    x = 123,446.21/322.33
  6. Step 6: Final answer
    x = 382.98

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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.