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Finding the Fourth Proportional to 299.72, 412.66 and 255.88

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Solution

The fourth proportional to 299.72, 412.66 and 255.88 is: 352.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.72 : 412.66 = 255.88 : x
  2. Step 2: Convert to fraction form
    299.72/412.66 = 255.88/x
  3. Step 3: Cross multiply
    299.72x = 412.66 × 255.88
  4. Step 4: Simplify right side
    299.72x = 105,591.44
  5. Step 5: Solve for x
    x = 105,591.44/299.72
  6. Step 6: Final answer
    x = 352.30

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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.