Home / 3,138.40-4,704.08-1,840.80

Finding the Fourth Proportional to 3,138.40, 4,704.08 and 1,840.80

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Solution

The fourth proportional to 3,138.40, 4,704.08 and 1,840.80 is: 2,759.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.40 : 4,704.08 = 1,840.80 : x
  2. Step 2: Convert to fraction form
    3,138.40/4,704.08 = 1,840.80/x
  3. Step 3: Cross multiply
    3,138.40x = 4,704.08 × 1,840.80
  4. Step 4: Simplify right side
    3,138.40x = 8,659,270.46
  5. Step 5: Solve for x
    x = 8,659,270.46/3,138.40
  6. Step 6: Final answer
    x = 2,759.14

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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.