Home / 2,840.55-4,257.24-1,278.90

Finding the Fourth Proportional to 2,840.55, 4,257.24 and 1,278.90

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Solution

The fourth proportional to 2,840.55, 4,257.24 and 1,278.90 is: 1,916.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.55 : 4,257.24 = 1,278.90 : x
  2. Step 2: Convert to fraction form
    2,840.55/4,257.24 = 1,278.90/x
  3. Step 3: Cross multiply
    2,840.55x = 4,257.24 × 1,278.90
  4. Step 4: Simplify right side
    2,840.55x = 5,444,584.24
  5. Step 5: Solve for x
    x = 5,444,584.24/2,840.55
  6. Step 6: Final answer
    x = 1,916.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.