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Finding the Fourth Proportional to 299.34, 411.75 and 255.60

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Solution

The fourth proportional to 299.34, 411.75 and 255.60 is: 351.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.34 : 411.75 = 255.60 : x
  2. Step 2: Convert to fraction form
    299.34/411.75 = 255.60/x
  3. Step 3: Cross multiply
    299.34x = 411.75 × 255.60
  4. Step 4: Simplify right side
    299.34x = 105,243.30
  5. Step 5: Solve for x
    x = 105,243.30/299.34
  6. Step 6: Final answer
    x = 351.58

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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.