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Finding the Fourth Proportional to 300.12, 415.08 and 238.56

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Solution

The fourth proportional to 300.12, 415.08 and 238.56 is: 329.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.12 : 415.08 = 238.56 : x
  2. Step 2: Convert to fraction form
    300.12/415.08 = 238.56/x
  3. Step 3: Cross multiply
    300.12x = 415.08 × 238.56
  4. Step 4: Simplify right side
    300.12x = 99,021.48
  5. Step 5: Solve for x
    x = 99,021.48/300.12
  6. Step 6: Final answer
    x = 329.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.