Home / 2,778.75-4,170.17-1,317.90

Finding the Fourth Proportional to 2,778.75, 4,170.17 and 1,317.90

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Solution

The fourth proportional to 2,778.75, 4,170.17 and 1,317.90 is: 1,977.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.75 : 4,170.17 = 1,317.90 : x
  2. Step 2: Convert to fraction form
    2,778.75/4,170.17 = 1,317.90/x
  3. Step 3: Cross multiply
    2,778.75x = 4,170.17 × 1,317.90
  4. Step 4: Simplify right side
    2,778.75x = 5,495,885.98
  5. Step 5: Solve for x
    x = 5,495,885.98/2,778.75
  6. Step 6: Final answer
    x = 1,977.83

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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.