Home / 2,778.78-4,165.43-1,318.95

Finding the Fourth Proportional to 2,778.78, 4,165.43 and 1,318.95

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Solution

The fourth proportional to 2,778.78, 4,165.43 and 1,318.95 is: 1,977.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.78 : 4,165.43 = 1,318.95 : x
  2. Step 2: Convert to fraction form
    2,778.78/4,165.43 = 1,318.95/x
  3. Step 3: Cross multiply
    2,778.78x = 4,165.43 × 1,318.95
  4. Step 4: Simplify right side
    2,778.78x = 5,494,007.87
  5. Step 5: Solve for x
    x = 5,494,007.87/2,778.78
  6. Step 6: Final answer
    x = 1,977.13

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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.