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Finding the Fourth Proportional to 655.18, 982.67 and 168.21

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Solution

The fourth proportional to 655.18, 982.67 and 168.21 is: 252.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.18 : 982.67 = 168.21 : x
  2. Step 2: Convert to fraction form
    655.18/982.67 = 168.21/x
  3. Step 3: Cross multiply
    655.18x = 982.67 × 168.21
  4. Step 4: Simplify right side
    655.18x = 165,289.17
  5. Step 5: Solve for x
    x = 165,289.17/655.18
  6. Step 6: Final answer
    x = 252.28

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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.