Home / 2,079.36-3,121.20-1,531.80

Finding the Fourth Proportional to 2,079.36, 3,121.20 and 1,531.80

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Solution

The fourth proportional to 2,079.36, 3,121.20 and 1,531.80 is: 2,299.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.36 : 3,121.20 = 1,531.80 : x
  2. Step 2: Convert to fraction form
    2,079.36/3,121.20 = 1,531.80/x
  3. Step 3: Cross multiply
    2,079.36x = 3,121.20 × 1,531.80
  4. Step 4: Simplify right side
    2,079.36x = 4,781,054.16
  5. Step 5: Solve for x
    x = 4,781,054.16/2,079.36
  6. Step 6: Final answer
    x = 2,299.29

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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.