Home / 1,999.23-2,758.91-1,115.02

Finding the Fourth Proportional to 1,999.23, 2,758.91 and 1,115.02

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Solution

The fourth proportional to 1,999.23, 2,758.91 and 1,115.02 is: 1,538.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.23 : 2,758.91 = 1,115.02 : x
  2. Step 2: Convert to fraction form
    1,999.23/2,758.91 = 1,115.02/x
  3. Step 3: Cross multiply
    1,999.23x = 2,758.91 × 1,115.02
  4. Step 4: Simplify right side
    1,999.23x = 3,076,228.45
  5. Step 5: Solve for x
    x = 3,076,228.45/1,999.23
  6. Step 6: Final answer
    x = 1,538.71

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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.