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Finding the Fourth Proportional to 328.21, 453.06 and 197.19

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Solution

The fourth proportional to 328.21, 453.06 and 197.19 is: 272.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.21 : 453.06 = 197.19 : x
  2. Step 2: Convert to fraction form
    328.21/453.06 = 197.19/x
  3. Step 3: Cross multiply
    328.21x = 453.06 × 197.19
  4. Step 4: Simplify right side
    328.21x = 89,338.90
  5. Step 5: Solve for x
    x = 89,338.90/328.21
  6. Step 6: Final answer
    x = 272.20

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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.