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Finding the Fourth Proportional to 300.69, 415.15 and 194.53

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Solution

The fourth proportional to 300.69, 415.15 and 194.53 is: 268.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.69 : 415.15 = 194.53 : x
  2. Step 2: Convert to fraction form
    300.69/415.15 = 194.53/x
  3. Step 3: Cross multiply
    300.69x = 415.15 × 194.53
  4. Step 4: Simplify right side
    300.69x = 80,758.38
  5. Step 5: Solve for x
    x = 80,758.38/300.69
  6. Step 6: Final answer
    x = 268.58

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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.