Home / 3,898.20-5,379.98-2,220.15

Finding the Fourth Proportional to 3,898.20, 5,379.98 and 2,220.15

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Solution

The fourth proportional to 3,898.20, 5,379.98 and 2,220.15 is: 3,064.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.20 : 5,379.98 = 2,220.15 : x
  2. Step 2: Convert to fraction form
    3,898.20/5,379.98 = 2,220.15/x
  3. Step 3: Cross multiply
    3,898.20x = 5,379.98 × 2,220.15
  4. Step 4: Simplify right side
    3,898.20x = 11,944,351.50
  5. Step 5: Solve for x
    x = 11,944,351.50/3,898.20
  6. Step 6: Final answer
    x = 3,064.07

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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.