Home / 2,778.26-4,165.78-1,317.40

Finding the Fourth Proportional to 2,778.26, 4,165.78 and 1,317.40

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Solution

The fourth proportional to 2,778.26, 4,165.78 and 1,317.40 is: 1,975.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.26 : 4,165.78 = 1,317.40 : x
  2. Step 2: Convert to fraction form
    2,778.26/4,165.78 = 1,317.40/x
  3. Step 3: Cross multiply
    2,778.26x = 4,165.78 × 1,317.40
  4. Step 4: Simplify right side
    2,778.26x = 5,487,998.57
  5. Step 5: Solve for x
    x = 5,487,998.57/2,778.26
  6. Step 6: Final answer
    x = 1,975.34

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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.