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Finding the Fourth Proportional to 663.55, 995.54 and 201.38

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Solution

The fourth proportional to 663.55, 995.54 and 201.38 is: 302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.55 : 995.54 = 201.38 : x
  2. Step 2: Convert to fraction form
    663.55/995.54 = 201.38/x
  3. Step 3: Cross multiply
    663.55x = 995.54 × 201.38
  4. Step 4: Simplify right side
    663.55x = 200,475.86
  5. Step 5: Solve for x
    x = 200,475.86/663.55
  6. Step 6: Final answer
    x = 302.13

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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.