Home / 2,145.12-3,217.92-683.91

Finding the Fourth Proportional to 2,145.12, 3,217.92 and 683.91

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Solution

The fourth proportional to 2,145.12, 3,217.92 and 683.91 is: 1,025.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.12 : 3,217.92 = 683.91 : x
  2. Step 2: Convert to fraction form
    2,145.12/3,217.92 = 683.91/x
  3. Step 3: Cross multiply
    2,145.12x = 3,217.92 × 683.91
  4. Step 4: Simplify right side
    2,145.12x = 2,200,767.67
  5. Step 5: Solve for x
    x = 2,200,767.67/2,145.12
  6. Step 6: Final answer
    x = 1,025.94

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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.