Home / 2,778.78-4,168.20-1,318.08

Finding the Fourth Proportional to 2,778.78, 4,168.20 and 1,318.08

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Solution

The fourth proportional to 2,778.78, 4,168.20 and 1,318.08 is: 1,977.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.78 : 4,168.20 = 1,318.08 : x
  2. Step 2: Convert to fraction form
    2,778.78/4,168.20 = 1,318.08/x
  3. Step 3: Cross multiply
    2,778.78x = 4,168.20 × 1,318.08
  4. Step 4: Simplify right side
    2,778.78x = 5,494,021.06
  5. Step 5: Solve for x
    x = 5,494,021.06/2,778.78
  6. Step 6: Final answer
    x = 1,977.13

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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.