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Finding the Fourth Proportional to 655.15, 982.93 and 222.61

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Solution

The fourth proportional to 655.15, 982.93 and 222.61 is: 333.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.15 : 982.93 = 222.61 : x
  2. Step 2: Convert to fraction form
    655.15/982.93 = 222.61/x
  3. Step 3: Cross multiply
    655.15x = 982.93 × 222.61
  4. Step 4: Simplify right side
    655.15x = 218,808.93
  5. Step 5: Solve for x
    x = 218,808.93/655.15
  6. Step 6: Final answer
    x = 333.98

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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.