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Finding the Fourth Proportional to 300.34, 449.90 and 190.30

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Solution

The fourth proportional to 300.34, 449.90 and 190.30 is: 285.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.34 : 449.90 = 190.30 : x
  2. Step 2: Convert to fraction form
    300.34/449.90 = 190.30/x
  3. Step 3: Cross multiply
    300.34x = 449.90 × 190.30
  4. Step 4: Simplify right side
    300.34x = 85,615.97
  5. Step 5: Solve for x
    x = 85,615.97/300.34
  6. Step 6: Final answer
    x = 285.06

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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.