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Finding the Fourth Proportional to 441.45, 661.64 and 197.64

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Solution

The fourth proportional to 441.45, 661.64 and 197.64 is: 296.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.45 : 661.64 = 197.64 : x
  2. Step 2: Convert to fraction form
    441.45/661.64 = 197.64/x
  3. Step 3: Cross multiply
    441.45x = 661.64 × 197.64
  4. Step 4: Simplify right side
    441.45x = 130,765.54
  5. Step 5: Solve for x
    x = 130,765.54/441.45
  6. Step 6: Final answer
    x = 296.22

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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.