Home / 4,163.40-6,245.70-1,390.20

Finding the Fourth Proportional to 4,163.40, 6,245.70 and 1,390.20

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Solution

The fourth proportional to 4,163.40, 6,245.70 and 1,390.20 is: 2,085.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,163.40 : 6,245.70 = 1,390.20 : x
  2. Step 2: Convert to fraction form
    4,163.40/6,245.70 = 1,390.20/x
  3. Step 3: Cross multiply
    4,163.40x = 6,245.70 × 1,390.20
  4. Step 4: Simplify right side
    4,163.40x = 8,682,772.14
  5. Step 5: Solve for x
    x = 8,682,772.14/4,163.40
  6. Step 6: Final answer
    x = 2,085.50

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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.