Home / 1,999.37-2,759.09-1,115.21

Finding the Fourth Proportional to 1,999.37, 2,759.09 and 1,115.21

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Solution

The fourth proportional to 1,999.37, 2,759.09 and 1,115.21 is: 1,538.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.37 : 2,759.09 = 1,115.21 : x
  2. Step 2: Convert to fraction form
    1,999.37/2,759.09 = 1,115.21/x
  3. Step 3: Cross multiply
    1,999.37x = 2,759.09 × 1,115.21
  4. Step 4: Simplify right side
    1,999.37x = 3,076,945.39
  5. Step 5: Solve for x
    x = 3,076,945.39/1,999.37
  6. Step 6: Final answer
    x = 1,538.96

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1.5x scale

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.