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Finding the Fourth Proportional to 453.26, 679.56 and 221.98

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Solution

The fourth proportional to 453.26, 679.56 and 221.98 is: 332.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.26 : 679.56 = 221.98 : x
  2. Step 2: Convert to fraction form
    453.26/679.56 = 221.98/x
  3. Step 3: Cross multiply
    453.26x = 679.56 × 221.98
  4. Step 4: Simplify right side
    453.26x = 150,848.73
  5. Step 5: Solve for x
    x = 150,848.73/453.26
  6. Step 6: Final answer
    x = 332.81

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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.