Home / 3,898.45-5,380.18-2,220.38

Finding the Fourth Proportional to 3,898.45, 5,380.18 and 2,220.38

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Solution

The fourth proportional to 3,898.45, 5,380.18 and 2,220.38 is: 3,064.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.45 : 5,380.18 = 2,220.38 : x
  2. Step 2: Convert to fraction form
    3,898.45/5,380.18 = 2,220.38/x
  3. Step 3: Cross multiply
    3,898.45x = 5,380.18 × 2,220.38
  4. Step 4: Simplify right side
    3,898.45x = 11,946,035.74
  5. Step 5: Solve for x
    x = 11,946,035.74/3,898.45
  6. Step 6: Final answer
    x = 3,064.31

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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.