Home / 3,390.88-5,085.36-1,081.12

Finding the Fourth Proportional to 3,390.88, 5,085.36 and 1,081.12

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Solution

The fourth proportional to 3,390.88, 5,085.36 and 1,081.12 is: 1,621.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.88 : 5,085.36 = 1,081.12 : x
  2. Step 2: Convert to fraction form
    3,390.88/5,085.36 = 1,081.12/x
  3. Step 3: Cross multiply
    3,390.88x = 5,085.36 × 1,081.12
  4. Step 4: Simplify right side
    3,390.88x = 5,497,884.40
  5. Step 5: Solve for x
    x = 5,497,884.40/3,390.88
  6. Step 6: Final answer
    x = 1,621.37

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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.