Home / 1,085.22-1,629.48-539.28

Finding the Fourth Proportional to 1,085.22, 1,629.48 and 539.28

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Solution

The fourth proportional to 1,085.22, 1,629.48 and 539.28 is: 809.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.22 : 1,629.48 = 539.28 : x
  2. Step 2: Convert to fraction form
    1,085.22/1,629.48 = 539.28/x
  3. Step 3: Cross multiply
    1,085.22x = 1,629.48 × 539.28
  4. Step 4: Simplify right side
    1,085.22x = 878,745.97
  5. Step 5: Solve for x
    x = 878,745.97/1,085.22
  6. Step 6: Final answer
    x = 809.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.