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Finding the Fourth Proportional to 328.88, 453.64 and 218.31

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Solution

The fourth proportional to 328.88, 453.64 and 218.31 is: 301.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.88 : 453.64 = 218.31 : x
  2. Step 2: Convert to fraction form
    328.88/453.64 = 218.31/x
  3. Step 3: Cross multiply
    328.88x = 453.64 × 218.31
  4. Step 4: Simplify right side
    328.88x = 99,034.15
  5. Step 5: Solve for x
    x = 99,034.15/328.88
  6. Step 6: Final answer
    x = 301.13

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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.