Home / 3,847.70-5,771.55-1,385.30

Finding the Fourth Proportional to 3,847.70, 5,771.55 and 1,385.30

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Solution

The fourth proportional to 3,847.70, 5,771.55 and 1,385.30 is: 2,077.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,847.70 : 5,771.55 = 1,385.30 : x
  2. Step 2: Convert to fraction form
    3,847.70/5,771.55 = 1,385.30/x
  3. Step 3: Cross multiply
    3,847.70x = 5,771.55 × 1,385.30
  4. Step 4: Simplify right side
    3,847.70x = 7,995,328.22
  5. Step 5: Solve for x
    x = 7,995,328.22/3,847.70
  6. Step 6: Final answer
    x = 2,077.95

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Similar ratio
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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.