Home / 2,840.79-3,919.84-1,778.03

Finding the Fourth Proportional to 2,840.79, 3,919.84 and 1,778.03

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Solution

The fourth proportional to 2,840.79, 3,919.84 and 1,778.03 is: 2,453.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.79 : 3,919.84 = 1,778.03 : x
  2. Step 2: Convert to fraction form
    2,840.79/3,919.84 = 1,778.03/x
  3. Step 3: Cross multiply
    2,840.79x = 3,919.84 × 1,778.03
  4. Step 4: Simplify right side
    2,840.79x = 6,969,615.82
  5. Step 5: Solve for x
    x = 6,969,615.82/2,840.79
  6. Step 6: Final answer
    x = 2,453.41

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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.