Home / 3,120.09-4,305.66-1,703.79

Finding the Fourth Proportional to 3,120.09, 4,305.66 and 1,703.79

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Solution

The fourth proportional to 3,120.09, 4,305.66 and 1,703.79 is: 2,351.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.09 : 4,305.66 = 1,703.79 : x
  2. Step 2: Convert to fraction form
    3,120.09/4,305.66 = 1,703.79/x
  3. Step 3: Cross multiply
    3,120.09x = 4,305.66 × 1,703.79
  4. Step 4: Simplify right side
    3,120.09x = 7,335,940.45
  5. Step 5: Solve for x
    x = 7,335,940.45/3,120.09
  6. Step 6: Final answer
    x = 2,351.20

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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.