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Finding the Fourth Proportional to 3,898.61, 5,378.21 and 2,834.73

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Solution

The fourth proportional to 3,898.61, 5,378.21 and 2,834.73 is: 3,910.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.61 : 5,378.21 = 2,834.73 : x
  2. Step 2: Convert to fraction form
    3,898.61/5,378.21 = 2,834.73/x
  3. Step 3: Cross multiply
    3,898.61x = 5,378.21 × 2,834.73
  4. Step 4: Simplify right side
    3,898.61x = 15,245,732.17
  5. Step 5: Solve for x
    x = 15,245,732.17/3,898.61
  6. Step 6: Final answer
    x = 3,910.56

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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.