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Finding the Fourth Proportional to 328.29, 453.09 and 197.31

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Solution

The fourth proportional to 328.29, 453.09 and 197.31 is: 272.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.29 : 453.09 = 197.31 : x
  2. Step 2: Convert to fraction form
    328.29/453.09 = 197.31/x
  3. Step 3: Cross multiply
    328.29x = 453.09 × 197.31
  4. Step 4: Simplify right side
    328.29x = 89,399.19
  5. Step 5: Solve for x
    x = 89,399.19/328.29
  6. Step 6: Final answer
    x = 272.32

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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.