Home / 3,428.57-4,731.42-1,936.80

Finding the Fourth Proportional to 3,428.57, 4,731.42 and 1,936.80

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Solution

The fourth proportional to 3,428.57, 4,731.42 and 1,936.80 is: 2,672.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.57 : 4,731.42 = 1,936.80 : x
  2. Step 2: Convert to fraction form
    3,428.57/4,731.42 = 1,936.80/x
  3. Step 3: Cross multiply
    3,428.57x = 4,731.42 × 1,936.80
  4. Step 4: Simplify right side
    3,428.57x = 9,163,814.26
  5. Step 5: Solve for x
    x = 9,163,814.26/3,428.57
  6. Step 6: Final answer
    x = 2,672.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.