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Finding the Fourth Proportional to 4,692.28, 7,039.91 and 2,938.41

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Solution

The fourth proportional to 4,692.28, 7,039.91 and 2,938.41 is: 4,408.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,692.28 : 7,039.91 = 2,938.41 : x
  2. Step 2: Convert to fraction form
    4,692.28/7,039.91 = 2,938.41/x
  3. Step 3: Cross multiply
    4,692.28x = 7,039.91 × 2,938.41
  4. Step 4: Simplify right side
    4,692.28x = 20,686,141.94
  5. Step 5: Solve for x
    x = 20,686,141.94/4,692.28
  6. Step 6: Final answer
    x = 4,408.55

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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.