Home / 1,999.32-2,759.08-1,115.12

Finding the Fourth Proportional to 1,999.32, 2,759.08 and 1,115.12

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Solution

The fourth proportional to 1,999.32, 2,759.08 and 1,115.12 is: 1,538.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.32 : 2,759.08 = 1,115.12 : x
  2. Step 2: Convert to fraction form
    1,999.32/2,759.08 = 1,115.12/x
  3. Step 3: Cross multiply
    1,999.32x = 2,759.08 × 1,115.12
  4. Step 4: Simplify right side
    1,999.32x = 3,076,705.29
  5. Step 5: Solve for x
    x = 3,076,705.29/1,999.32
  6. Step 6: Final answer
    x = 1,538.88

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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.