Home / 4,078.56-6,120.90-2,985.74

Finding the Fourth Proportional to 4,078.56, 6,120.90 and 2,985.74

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Solution

The fourth proportional to 4,078.56, 6,120.90 and 2,985.74 is: 4,480.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,078.56 : 6,120.90 = 2,985.74 : x
  2. Step 2: Convert to fraction form
    4,078.56/6,120.90 = 2,985.74/x
  3. Step 3: Cross multiply
    4,078.56x = 6,120.90 × 2,985.74
  4. Step 4: Simplify right side
    4,078.56x = 18,275,415.97
  5. Step 5: Solve for x
    x = 18,275,415.97/4,078.56
  6. Step 6: Final answer
    x = 4,480.85

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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.