Home / 3,879.60-5,355.22-2,307.68

Finding the Fourth Proportional to 3,879.60, 5,355.22 and 2,307.68

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Solution

The fourth proportional to 3,879.60, 5,355.22 and 2,307.68 is: 3,185.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.60 : 5,355.22 = 2,307.68 : x
  2. Step 2: Convert to fraction form
    3,879.60/5,355.22 = 2,307.68/x
  3. Step 3: Cross multiply
    3,879.60x = 5,355.22 × 2,307.68
  4. Step 4: Simplify right side
    3,879.60x = 12,358,134.09
  5. Step 5: Solve for x
    x = 12,358,134.09/3,879.60
  6. Step 6: Final answer
    x = 3,185.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.