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Finding the Fourth Proportional to 300.60, 411.96 and 300.12

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Solution

The fourth proportional to 300.60, 411.96 and 300.12 is: 411.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.60 : 411.96 = 300.12 : x
  2. Step 2: Convert to fraction form
    300.60/411.96 = 300.12/x
  3. Step 3: Cross multiply
    300.60x = 411.96 × 300.12
  4. Step 4: Simplify right side
    300.60x = 123,637.44
  5. Step 5: Solve for x
    x = 123,637.44/300.60
  6. Step 6: Final answer
    x = 411.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.