Home / 3,128.20-4,692.30-2,744.20

Finding the Fourth Proportional to 3,128.20, 4,692.30 and 2,744.20

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Solution

The fourth proportional to 3,128.20, 4,692.30 and 2,744.20 is: 4,116.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.20 : 4,692.30 = 2,744.20 : x
  2. Step 2: Convert to fraction form
    3,128.20/4,692.30 = 2,744.20/x
  3. Step 3: Cross multiply
    3,128.20x = 4,692.30 × 2,744.20
  4. Step 4: Simplify right side
    3,128.20x = 12,876,609.66
  5. Step 5: Solve for x
    x = 12,876,609.66/3,128.20
  6. Step 6: Final answer
    x = 4,116.30

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1.5x scale

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.