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Finding the Fourth Proportional to 664.39, 998.39 and 356.41

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Solution

The fourth proportional to 664.39, 998.39 and 356.41 is: 535.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.39 : 998.39 = 356.41 : x
  2. Step 2: Convert to fraction form
    664.39/998.39 = 356.41/x
  3. Step 3: Cross multiply
    664.39x = 998.39 × 356.41
  4. Step 4: Simplify right side
    664.39x = 355,836.18
  5. Step 5: Solve for x
    x = 355,836.18/664.39
  6. Step 6: Final answer
    x = 535.58

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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.