Home / 1,984.15-2,736.91-1,311.95

Finding the Fourth Proportional to 1,984.15, 2,736.91 and 1,311.95

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Solution

The fourth proportional to 1,984.15, 2,736.91 and 1,311.95 is: 1,809.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.15 : 2,736.91 = 1,311.95 : x
  2. Step 2: Convert to fraction form
    1,984.15/2,736.91 = 1,311.95/x
  3. Step 3: Cross multiply
    1,984.15x = 2,736.91 × 1,311.95
  4. Step 4: Simplify right side
    1,984.15x = 3,590,685.85
  5. Step 5: Solve for x
    x = 3,590,685.85/1,984.15
  6. Step 6: Final answer
    x = 1,809.69

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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.