Home / 1,990.36-2,739.18-1,783

Finding the Fourth Proportional to 1,990.36, 2,739.18 and 1,783

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Solution

The fourth proportional to 1,990.36, 2,739.18 and 1,783 is: 2,453.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.36 : 2,739.18 = 1,783 : x
  2. Step 2: Convert to fraction form
    1,990.36/2,739.18 = 1,783/x
  3. Step 3: Cross multiply
    1,990.36x = 2,739.18 × 1,783
  4. Step 4: Simplify right side
    1,990.36x = 4,883,957.94
  5. Step 5: Solve for x
    x = 4,883,957.94/1,990.36
  6. Step 6: Final answer
    x = 2,453.81

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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.