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Finding the Fourth Proportional to 450.21, 675.30 and 219.09

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Solution

The fourth proportional to 450.21, 675.30 and 219.09 is: 328.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.21 : 675.30 = 219.09 : x
  2. Step 2: Convert to fraction form
    450.21/675.30 = 219.09/x
  3. Step 3: Cross multiply
    450.21x = 675.30 × 219.09
  4. Step 4: Simplify right side
    450.21x = 147,951.48
  5. Step 5: Solve for x
    x = 147,951.48/450.21
  6. Step 6: Final answer
    x = 328.63

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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.