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Finding the Fourth Proportional to 450.90, 676.35 and 219.71

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Solution

The fourth proportional to 450.90, 676.35 and 219.71 is: 329.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.90 : 676.35 = 219.71 : x
  2. Step 2: Convert to fraction form
    450.90/676.35 = 219.71/x
  3. Step 3: Cross multiply
    450.90x = 676.35 × 219.71
  4. Step 4: Simplify right side
    450.90x = 148,600.86
  5. Step 5: Solve for x
    x = 148,600.86/450.90
  6. Step 6: Final answer
    x = 329.57

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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.