Home / 2,210.85-3,315.20-1,286.69

Finding the Fourth Proportional to 2,210.85, 3,315.20 and 1,286.69

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Solution

The fourth proportional to 2,210.85, 3,315.20 and 1,286.69 is: 1,929.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,210.85 : 3,315.20 = 1,286.69 : x
  2. Step 2: Convert to fraction form
    2,210.85/3,315.20 = 1,286.69/x
  3. Step 3: Cross multiply
    2,210.85x = 3,315.20 × 1,286.69
  4. Step 4: Simplify right side
    2,210.85x = 4,265,611.68
  5. Step 5: Solve for x
    x = 4,265,611.68/2,210.85
  6. Step 6: Final answer
    x = 1,929.40

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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.