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Finding the Fourth Proportional to 328.31, 453.08 and 197.30

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Solution

The fourth proportional to 328.31, 453.08 and 197.30 is: 272.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.31 : 453.08 = 197.30 : x
  2. Step 2: Convert to fraction form
    328.31/453.08 = 197.30/x
  3. Step 3: Cross multiply
    328.31x = 453.08 × 197.30
  4. Step 4: Simplify right side
    328.31x = 89,389.43
  5. Step 5: Solve for x
    x = 89,389.43/328.31
  6. Step 6: Final answer
    x = 272.27

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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.