Home / 2,840.41-3,921.69-1,778.59

Finding the Fourth Proportional to 2,840.41, 3,921.69 and 1,778.59

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Solution

The fourth proportional to 2,840.41, 3,921.69 and 1,778.59 is: 2,455.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.41 : 3,921.69 = 1,778.59 : x
  2. Step 2: Convert to fraction form
    2,840.41/3,921.69 = 1,778.59/x
  3. Step 3: Cross multiply
    2,840.41x = 3,921.69 × 1,778.59
  4. Step 4: Simplify right side
    2,840.41x = 6,975,078.62
  5. Step 5: Solve for x
    x = 6,975,078.62/2,840.41
  6. Step 6: Final answer
    x = 2,455.66

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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.