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Finding the Fourth Proportional to 300.05, 450.10 and 80.68

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Solution

The fourth proportional to 300.05, 450.10 and 80.68 is: 121.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.05 : 450.10 = 80.68 : x
  2. Step 2: Convert to fraction form
    300.05/450.10 = 80.68/x
  3. Step 3: Cross multiply
    300.05x = 450.10 × 80.68
  4. Step 4: Simplify right side
    300.05x = 36,314.07
  5. Step 5: Solve for x
    x = 36,314.07/300.05
  6. Step 6: Final answer
    x = 121.03

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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.