Home / 2,778.25-4,169.43-1,317.40

Finding the Fourth Proportional to 2,778.25, 4,169.43 and 1,317.40

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Solution

The fourth proportional to 2,778.25, 4,169.43 and 1,317.40 is: 1,977.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.25 : 4,169.43 = 1,317.40 : x
  2. Step 2: Convert to fraction form
    2,778.25/4,169.43 = 1,317.40/x
  3. Step 3: Cross multiply
    2,778.25x = 4,169.43 × 1,317.40
  4. Step 4: Simplify right side
    2,778.25x = 5,492,807.08
  5. Step 5: Solve for x
    x = 5,492,807.08/2,778.25
  6. Step 6: Final answer
    x = 1,977.07

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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.