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Finding the Fourth Proportional to 663.89, 995.88 and 201.79

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Solution

The fourth proportional to 663.89, 995.88 and 201.79 is: 302.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.89 : 995.88 = 201.79 : x
  2. Step 2: Convert to fraction form
    663.89/995.88 = 201.79/x
  3. Step 3: Cross multiply
    663.89x = 995.88 × 201.79
  4. Step 4: Simplify right side
    663.89x = 200,958.63
  5. Step 5: Solve for x
    x = 200,958.63/663.89
  6. Step 6: Final answer
    x = 302.70

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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.