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Finding the Fourth Proportional to 386.26, 579.71 and 299.39

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Solution

The fourth proportional to 386.26, 579.71 and 299.39 is: 449.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.26 : 579.71 = 299.39 : x
  2. Step 2: Convert to fraction form
    386.26/579.71 = 299.39/x
  3. Step 3: Cross multiply
    386.26x = 579.71 × 299.39
  4. Step 4: Simplify right side
    386.26x = 173,558.80
  5. Step 5: Solve for x
    x = 173,558.80/386.26
  6. Step 6: Final answer
    x = 449.33

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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.