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Finding the Fourth Proportional to 3,404.91, 4,698.90 and 1,912.76

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Solution

The fourth proportional to 3,404.91, 4,698.90 and 1,912.76 is: 2,639.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,404.91 : 4,698.90 = 1,912.76 : x
  2. Step 2: Convert to fraction form
    3,404.91/4,698.90 = 1,912.76/x
  3. Step 3: Cross multiply
    3,404.91x = 4,698.90 × 1,912.76
  4. Step 4: Simplify right side
    3,404.91x = 8,987,862.09
  5. Step 5: Solve for x
    x = 8,987,862.09/3,404.91
  6. Step 6: Final answer
    x = 2,639.67

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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.