Home / 1,999.30-2,758.62-1,115.09

Finding the Fourth Proportional to 1,999.30, 2,758.62 and 1,115.09

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Solution

The fourth proportional to 1,999.30, 2,758.62 and 1,115.09 is: 1,538.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.30 : 2,758.62 = 1,115.09 : x
  2. Step 2: Convert to fraction form
    1,999.30/2,758.62 = 1,115.09/x
  3. Step 3: Cross multiply
    1,999.30x = 2,758.62 × 1,115.09
  4. Step 4: Simplify right side
    1,999.30x = 3,076,109.58
  5. Step 5: Solve for x
    x = 3,076,109.58/1,999.30
  6. Step 6: Final answer
    x = 1,538.59

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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.