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Finding the Fourth Proportional to 299.10, 412.38 and 255.36

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Solution

The fourth proportional to 299.10, 412.38 and 255.36 is: 352.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.10 : 412.38 = 255.36 : x
  2. Step 2: Convert to fraction form
    299.10/412.38 = 255.36/x
  3. Step 3: Cross multiply
    299.10x = 412.38 × 255.36
  4. Step 4: Simplify right side
    299.10x = 105,305.36
  5. Step 5: Solve for x
    x = 105,305.36/299.10
  6. Step 6: Final answer
    x = 352.07

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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.