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Finding the Fourth Proportional to 299.94, 449.09 and 155.35

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Solution

The fourth proportional to 299.94, 449.09 and 155.35 is: 232.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.94 : 449.09 = 155.35 : x
  2. Step 2: Convert to fraction form
    299.94/449.09 = 155.35/x
  3. Step 3: Cross multiply
    299.94x = 449.09 × 155.35
  4. Step 4: Simplify right side
    299.94x = 69,766.13
  5. Step 5: Solve for x
    x = 69,766.13/299.94
  6. Step 6: Final answer
    x = 232.60

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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.