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Finding the Fourth Proportional to 443.22, 663.78 and 247.95

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Solution

The fourth proportional to 443.22, 663.78 and 247.95 is: 371.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.22 : 663.78 = 247.95 : x
  2. Step 2: Convert to fraction form
    443.22/663.78 = 247.95/x
  3. Step 3: Cross multiply
    443.22x = 663.78 × 247.95
  4. Step 4: Simplify right side
    443.22x = 164,584.25
  5. Step 5: Solve for x
    x = 164,584.25/443.22
  6. Step 6: Final answer
    x = 371.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.