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Finding the Fourth Proportional to 3,898.76, 5,379.77 and 2,219.94

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Solution

The fourth proportional to 3,898.76, 5,379.77 and 2,219.94 is: 3,063.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.76 : 5,379.77 = 2,219.94 : x
  2. Step 2: Convert to fraction form
    3,898.76/5,379.77 = 2,219.94/x
  3. Step 3: Cross multiply
    3,898.76x = 5,379.77 × 2,219.94
  4. Step 4: Simplify right side
    3,898.76x = 11,942,772.16
  5. Step 5: Solve for x
    x = 11,942,772.16/3,898.76
  6. Step 6: Final answer
    x = 3,063.23

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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.