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Finding the Fourth Proportional to 300.18, 450.29 and 80.80

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Solution

The fourth proportional to 300.18, 450.29 and 80.80 is: 121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.18 : 450.29 = 80.80 : x
  2. Step 2: Convert to fraction form
    300.18/450.29 = 80.80/x
  3. Step 3: Cross multiply
    300.18x = 450.29 × 80.80
  4. Step 4: Simplify right side
    300.18x = 36,382.51
  5. Step 5: Solve for x
    x = 36,382.51/300.18
  6. Step 6: Final answer
    x = 121.20

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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.