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Finding the Fourth Proportional to 300.20, 450.46 and 137.89

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Solution

The fourth proportional to 300.20, 450.46 and 137.89 is: 206.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.20 : 450.46 = 137.89 : x
  2. Step 2: Convert to fraction form
    300.20/450.46 = 137.89/x
  3. Step 3: Cross multiply
    300.20x = 450.46 × 137.89
  4. Step 4: Simplify right side
    300.20x = 62,114.66
  5. Step 5: Solve for x
    x = 62,114.66/300.20
  6. Step 6: Final answer
    x = 206.91

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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.