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Finding the Fourth Proportional to 799.26, 1,199.43 and 388.68

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Solution

The fourth proportional to 799.26, 1,199.43 and 388.68 is: 583.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.26 : 1,199.43 = 388.68 : x
  2. Step 2: Convert to fraction form
    799.26/1,199.43 = 388.68/x
  3. Step 3: Cross multiply
    799.26x = 1,199.43 × 388.68
  4. Step 4: Simplify right side
    799.26x = 466,194.45
  5. Step 5: Solve for x
    x = 466,194.45/799.26
  6. Step 6: Final answer
    x = 583.28

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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.