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Finding the Fourth Proportional to 789,408.88, 1,184,188 and 220,790

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Solution

The fourth proportional to 789,408.88, 1,184,188 and 220,790 is: 331,205.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,408.88 : 1,184,188 = 220,790 : x
  2. Step 2: Convert to fraction form
    789,408.88/1,184,188 = 220,790/x
  3. Step 3: Cross multiply
    789,408.88x = 1,184,188 × 220,790
  4. Step 4: Simplify right side
    789,408.88x = 261,456,868,520
  5. Step 5: Solve for x
    x = 261,456,868,520/789,408.88
  6. Step 6: Final answer
    x = 331,205.89

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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.