Home / 3,851.20-5,776.80-2,611.90

Finding the Fourth Proportional to 3,851.20, 5,776.80 and 2,611.90

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Solution

The fourth proportional to 3,851.20, 5,776.80 and 2,611.90 is: 3,917.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.20 : 5,776.80 = 2,611.90 : x
  2. Step 2: Convert to fraction form
    3,851.20/5,776.80 = 2,611.90/x
  3. Step 3: Cross multiply
    3,851.20x = 5,776.80 × 2,611.90
  4. Step 4: Simplify right side
    3,851.20x = 15,088,423.92
  5. Step 5: Solve for x
    x = 15,088,423.92/3,851.20
  6. Step 6: Final answer
    x = 3,917.85

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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.