Home / 3,106.80-4,286.68-1,779.76

Finding the Fourth Proportional to 3,106.80, 4,286.68 and 1,779.76

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Solution

The fourth proportional to 3,106.80, 4,286.68 and 1,779.76 is: 2,455.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.80 : 4,286.68 = 1,779.76 : x
  2. Step 2: Convert to fraction form
    3,106.80/4,286.68 = 1,779.76/x
  3. Step 3: Cross multiply
    3,106.80x = 4,286.68 × 1,779.76
  4. Step 4: Simplify right side
    3,106.80x = 7,629,261.60
  5. Step 5: Solve for x
    x = 7,629,261.60/3,106.80
  6. Step 6: Final answer
    x = 2,455.67

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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.