Home / 1,919.40-2,874.99-1,688.85

Finding the Fourth Proportional to 1,919.40, 2,874.99 and 1,688.85

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Solution

The fourth proportional to 1,919.40, 2,874.99 and 1,688.85 is: 2,529.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.40 : 2,874.99 = 1,688.85 : x
  2. Step 2: Convert to fraction form
    1,919.40/2,874.99 = 1,688.85/x
  3. Step 3: Cross multiply
    1,919.40x = 2,874.99 × 1,688.85
  4. Step 4: Simplify right side
    1,919.40x = 4,855,433.19
  5. Step 5: Solve for x
    x = 4,855,433.19/1,919.40
  6. Step 6: Final answer
    x = 2,529.67

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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.