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Finding the Fourth Proportional to 328.82, 453.95 and 218.39

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Solution

The fourth proportional to 328.82, 453.95 and 218.39 is: 301.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.82 : 453.95 = 218.39 : x
  2. Step 2: Convert to fraction form
    328.82/453.95 = 218.39/x
  3. Step 3: Cross multiply
    328.82x = 453.95 × 218.39
  4. Step 4: Simplify right side
    328.82x = 99,134.78
  5. Step 5: Solve for x
    x = 99,134.78/328.82
  6. Step 6: Final answer
    x = 301.49

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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.