Home / 2,778.64-4,167.92-1,317.04

Finding the Fourth Proportional to 2,778.64, 4,167.92 and 1,317.04

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Solution

The fourth proportional to 2,778.64, 4,167.92 and 1,317.04 is: 1,975.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.64 : 4,167.92 = 1,317.04 : x
  2. Step 2: Convert to fraction form
    2,778.64/4,167.92 = 1,317.04/x
  3. Step 3: Cross multiply
    2,778.64x = 4,167.92 × 1,317.04
  4. Step 4: Simplify right side
    2,778.64x = 5,489,317.36
  5. Step 5: Solve for x
    x = 5,489,317.36/2,778.64
  6. Step 6: Final answer
    x = 1,975.54

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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.