Home / 1,085.44-1,629.78-1,039.36

Finding the Fourth Proportional to 1,085.44, 1,629.78 and 1,039.36

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Solution

The fourth proportional to 1,085.44, 1,629.78 and 1,039.36 is: 1,560.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.44 : 1,629.78 = 1,039.36 : x
  2. Step 2: Convert to fraction form
    1,085.44/1,629.78 = 1,039.36/x
  3. Step 3: Cross multiply
    1,085.44x = 1,629.78 × 1,039.36
  4. Step 4: Simplify right side
    1,085.44x = 1,693,928.14
  5. Step 5: Solve for x
    x = 1,693,928.14/1,085.44
  6. Step 6: Final answer
    x = 1,560.59

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1.5x scale

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.