Home / 2,790.39-3,851.40-1,895.60

Finding the Fourth Proportional to 2,790.39, 3,851.40 and 1,895.60

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Solution

The fourth proportional to 2,790.39, 3,851.40 and 1,895.60 is: 2,616.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.39 : 3,851.40 = 1,895.60 : x
  2. Step 2: Convert to fraction form
    2,790.39/3,851.40 = 1,895.60/x
  3. Step 3: Cross multiply
    2,790.39x = 3,851.40 × 1,895.60
  4. Step 4: Simplify right side
    2,790.39x = 7,300,707.73
  5. Step 5: Solve for x
    x = 7,300,707.73/2,790.39
  6. Step 6: Final answer
    x = 2,616.38

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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.