Home / 3,320.20-4,991.10-3,125.80

Finding the Fourth Proportional to 3,320.20, 4,991.10 and 3,125.80

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Solution

The fourth proportional to 3,320.20, 4,991.10 and 3,125.80 is: 4,698.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.20 : 4,991.10 = 3,125.80 : x
  2. Step 2: Convert to fraction form
    3,320.20/4,991.10 = 3,125.80/x
  3. Step 3: Cross multiply
    3,320.20x = 4,991.10 × 3,125.80
  4. Step 4: Simplify right side
    3,320.20x = 15,601,180.38
  5. Step 5: Solve for x
    x = 15,601,180.38/3,320.20
  6. Step 6: Final answer
    x = 4,698.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.