Home / 2,790.28-3,850.70-1,531.38

Finding the Fourth Proportional to 2,790.28, 3,850.70 and 1,531.38

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Solution

The fourth proportional to 2,790.28, 3,850.70 and 1,531.38 is: 2,113.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.28 : 3,850.70 = 1,531.38 : x
  2. Step 2: Convert to fraction form
    2,790.28/3,850.70 = 1,531.38/x
  3. Step 3: Cross multiply
    2,790.28x = 3,850.70 × 1,531.38
  4. Step 4: Simplify right side
    2,790.28x = 5,896,891.75
  5. Step 5: Solve for x
    x = 5,896,891.75/2,790.28
  6. Step 6: Final answer
    x = 2,113.37

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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.