Home / 1,999.55-2,759.40-1,115.44

Finding the Fourth Proportional to 1,999.55, 2,759.40 and 1,115.44

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Solution

The fourth proportional to 1,999.55, 2,759.40 and 1,115.44 is: 1,539.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.55 : 2,759.40 = 1,115.44 : x
  2. Step 2: Convert to fraction form
    1,999.55/2,759.40 = 1,115.44/x
  3. Step 3: Cross multiply
    1,999.55x = 2,759.40 × 1,115.44
  4. Step 4: Simplify right side
    1,999.55x = 3,077,938.24
  5. Step 5: Solve for x
    x = 3,077,938.24/1,999.55
  6. Step 6: Final answer
    x = 1,539.31

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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.