Home / 1,999.47-2,759.27-1,115.25

Finding the Fourth Proportional to 1,999.47, 2,759.27 and 1,115.25

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Solution

The fourth proportional to 1,999.47, 2,759.27 and 1,115.25 is: 1,539.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.47 : 2,759.27 = 1,115.25 : x
  2. Step 2: Convert to fraction form
    1,999.47/2,759.27 = 1,115.25/x
  3. Step 3: Cross multiply
    1,999.47x = 2,759.27 × 1,115.25
  4. Step 4: Simplify right side
    1,999.47x = 3,077,275.87
  5. Step 5: Solve for x
    x = 3,077,275.87/1,999.47
  6. Step 6: Final answer
    x = 1,539.05

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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.