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Finding the Fourth Proportional to 664.01, 995.96 and 201.78

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Solution

The fourth proportional to 664.01, 995.96 and 201.78 is: 302.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.01 : 995.96 = 201.78 : x
  2. Step 2: Convert to fraction form
    664.01/995.96 = 201.78/x
  3. Step 3: Cross multiply
    664.01x = 995.96 × 201.78
  4. Step 4: Simplify right side
    664.01x = 200,963.80
  5. Step 5: Solve for x
    x = 200,963.80/664.01
  6. Step 6: Final answer
    x = 302.65

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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.