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Finding the Fourth Proportional to 328.45, 453.08 and 197.39

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Solution

The fourth proportional to 328.45, 453.08 and 197.39 is: 272.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.45 : 453.08 = 197.39 : x
  2. Step 2: Convert to fraction form
    328.45/453.08 = 197.39/x
  3. Step 3: Cross multiply
    328.45x = 453.08 × 197.39
  4. Step 4: Simplify right side
    328.45x = 89,433.46
  5. Step 5: Solve for x
    x = 89,433.46/328.45
  6. Step 6: Final answer
    x = 272.29

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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.