Home / 2,778.98-4,168.67-2,638.85

Finding the Fourth Proportional to 2,778.98, 4,168.67 and 2,638.85

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Solution

The fourth proportional to 2,778.98, 4,168.67 and 2,638.85 is: 3,958.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.98 : 4,168.67 = 2,638.85 : x
  2. Step 2: Convert to fraction form
    2,778.98/4,168.67 = 2,638.85/x
  3. Step 3: Cross multiply
    2,778.98x = 4,168.67 × 2,638.85
  4. Step 4: Simplify right side
    2,778.98x = 11,000,460.79
  5. Step 5: Solve for x
    x = 11,000,460.79/2,778.98
  6. Step 6: Final answer
    x = 3,958.46

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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.