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Finding the Fourth Proportional to 655.20, 982.33 and 330.39

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Solution

The fourth proportional to 655.20, 982.33 and 330.39 is: 495.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.20 : 982.33 = 330.39 : x
  2. Step 2: Convert to fraction form
    655.20/982.33 = 330.39/x
  3. Step 3: Cross multiply
    655.20x = 982.33 × 330.39
  4. Step 4: Simplify right side
    655.20x = 324,551.18
  5. Step 5: Solve for x
    x = 324,551.18/655.20
  6. Step 6: Final answer
    x = 495.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.