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Finding the Fourth Proportional to 300.39, 414.87 and 245.42

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Solution

The fourth proportional to 300.39, 414.87 and 245.42 is: 338.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.39 : 414.87 = 245.42 : x
  2. Step 2: Convert to fraction form
    300.39/414.87 = 245.42/x
  3. Step 3: Cross multiply
    300.39x = 414.87 × 245.42
  4. Step 4: Simplify right side
    300.39x = 101,815.32
  5. Step 5: Solve for x
    x = 101,815.32/300.39
  6. Step 6: Final answer
    x = 338.94

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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.