Home / 3,078.98-4,620.90-1,131.74

Finding the Fourth Proportional to 3,078.98, 4,620.90 and 1,131.74

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Solution

The fourth proportional to 3,078.98, 4,620.90 and 1,131.74 is: 1,698.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.98 : 4,620.90 = 1,131.74 : x
  2. Step 2: Convert to fraction form
    3,078.98/4,620.90 = 1,131.74/x
  3. Step 3: Cross multiply
    3,078.98x = 4,620.90 × 1,131.74
  4. Step 4: Simplify right side
    3,078.98x = 5,229,657.37
  5. Step 5: Solve for x
    x = 5,229,657.37/3,078.98
  6. Step 6: Final answer
    x = 1,698.50

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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.