Home / 2,072.12-3,108.20-611.28

Finding the Fourth Proportional to 2,072.12, 3,108.20 and 611.28

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Solution

The fourth proportional to 2,072.12, 3,108.20 and 611.28 is: 916.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.12 : 3,108.20 = 611.28 : x
  2. Step 2: Convert to fraction form
    2,072.12/3,108.20 = 611.28/x
  3. Step 3: Cross multiply
    2,072.12x = 3,108.20 × 611.28
  4. Step 4: Simplify right side
    2,072.12x = 1,899,977.44
  5. Step 5: Solve for x
    x = 1,899,977.44/2,072.12
  6. Step 6: Final answer
    x = 916.93

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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.