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Finding the Fourth Proportional to 328.43, 452.98 and 239.90

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Solution

The fourth proportional to 328.43, 452.98 and 239.90 is: 330.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.43 : 452.98 = 239.90 : x
  2. Step 2: Convert to fraction form
    328.43/452.98 = 239.90/x
  3. Step 3: Cross multiply
    328.43x = 452.98 × 239.90
  4. Step 4: Simplify right side
    328.43x = 108,669.90
  5. Step 5: Solve for x
    x = 108,669.90/328.43
  6. Step 6: Final answer
    x = 330.88

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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.