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Finding the Fourth Proportional to 328.87, 453.81 and 197.88

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Solution

The fourth proportional to 328.87, 453.81 and 197.88 is: 273.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.87 : 453.81 = 197.88 : x
  2. Step 2: Convert to fraction form
    328.87/453.81 = 197.88/x
  3. Step 3: Cross multiply
    328.87x = 453.81 × 197.88
  4. Step 4: Simplify right side
    328.87x = 89,799.92
  5. Step 5: Solve for x
    x = 89,799.92/328.87
  6. Step 6: Final answer
    x = 273.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.