Home / 2,085.40-3,131.40-1,933.80

Finding the Fourth Proportional to 2,085.40, 3,131.40 and 1,933.80

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Solution

The fourth proportional to 2,085.40, 3,131.40 and 1,933.80 is: 2,903.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.40 : 3,131.40 = 1,933.80 : x
  2. Step 2: Convert to fraction form
    2,085.40/3,131.40 = 1,933.80/x
  3. Step 3: Cross multiply
    2,085.40x = 3,131.40 × 1,933.80
  4. Step 4: Simplify right side
    2,085.40x = 6,055,501.32
  5. Step 5: Solve for x
    x = 6,055,501.32/2,085.40
  6. Step 6: Final answer
    x = 2,903.76

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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.