Home / 2,457.12-3,391.92-1,990.56

Finding the Fourth Proportional to 2,457.12, 3,391.92 and 1,990.56

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Solution

The fourth proportional to 2,457.12, 3,391.92 and 1,990.56 is: 2,747.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,457.12 : 3,391.92 = 1,990.56 : x
  2. Step 2: Convert to fraction form
    2,457.12/3,391.92 = 1,990.56/x
  3. Step 3: Cross multiply
    2,457.12x = 3,391.92 × 1,990.56
  4. Step 4: Simplify right side
    2,457.12x = 6,751,820.28
  5. Step 5: Solve for x
    x = 6,751,820.28/2,457.12
  6. Step 6: Final answer
    x = 2,747.86

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1.5x scale

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.