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Finding the Fourth Proportional to 655.75, 982.68 and 378.09

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Solution

The fourth proportional to 655.75, 982.68 and 378.09 is: 566.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.75 : 982.68 = 378.09 : x
  2. Step 2: Convert to fraction form
    655.75/982.68 = 378.09/x
  3. Step 3: Cross multiply
    655.75x = 982.68 × 378.09
  4. Step 4: Simplify right side
    655.75x = 371,540.53
  5. Step 5: Solve for x
    x = 371,540.53/655.75
  6. Step 6: Final answer
    x = 566.59

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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.