Home / 3,898.64-5,379.92-2,219.84

Finding the Fourth Proportional to 3,898.64, 5,379.92 and 2,219.84

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Solution

The fourth proportional to 3,898.64, 5,379.92 and 2,219.84 is: 3,063.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.64 : 5,379.92 = 2,219.84 : x
  2. Step 2: Convert to fraction form
    3,898.64/5,379.92 = 2,219.84/x
  3. Step 3: Cross multiply
    3,898.64x = 5,379.92 × 2,219.84
  4. Step 4: Simplify right side
    3,898.64x = 11,942,561.61
  5. Step 5: Solve for x
    x = 11,942,561.61/3,898.64
  6. Step 6: Final answer
    x = 3,063.26

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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.