Home / 4,209.15-6,311.49-1,286.67

Finding the Fourth Proportional to 4,209.15, 6,311.49 and 1,286.67

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Solution

The fourth proportional to 4,209.15, 6,311.49 and 1,286.67 is: 1,929.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,209.15 : 6,311.49 = 1,286.67 : x
  2. Step 2: Convert to fraction form
    4,209.15/6,311.49 = 1,286.67/x
  3. Step 3: Cross multiply
    4,209.15x = 6,311.49 × 1,286.67
  4. Step 4: Simplify right side
    4,209.15x = 8,120,776.35
  5. Step 5: Solve for x
    x = 8,120,776.35/4,209.15
  6. Step 6: Final answer
    x = 1,929.32

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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.