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Finding the Fourth Proportional to 299.86, 411.60 and 266.38

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Solution

The fourth proportional to 299.86, 411.60 and 266.38 is: 365.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.86 : 411.60 = 266.38 : x
  2. Step 2: Convert to fraction form
    299.86/411.60 = 266.38/x
  3. Step 3: Cross multiply
    299.86x = 411.60 × 266.38
  4. Step 4: Simplify right side
    299.86x = 109,640.68
  5. Step 5: Solve for x
    x = 109,640.68/299.86
  6. Step 6: Final answer
    x = 365.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.