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Finding the Fourth Proportional to 328.51, 453.12 and 197.38

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Solution

The fourth proportional to 328.51, 453.12 and 197.38 is: 272.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.51 : 453.12 = 197.38 : x
  2. Step 2: Convert to fraction form
    328.51/453.12 = 197.38/x
  3. Step 3: Cross multiply
    328.51x = 453.12 × 197.38
  4. Step 4: Simplify right side
    328.51x = 89,434.56
  5. Step 5: Solve for x
    x = 89,434.56/328.51
  6. Step 6: Final answer
    x = 272.25

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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.