Home / 3,120.06-4,305.63-1,722.78

Finding the Fourth Proportional to 3,120.06, 4,305.63 and 1,722.78

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Solution

The fourth proportional to 3,120.06, 4,305.63 and 1,722.78 is: 2,377.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.06 : 4,305.63 = 1,722.78 : x
  2. Step 2: Convert to fraction form
    3,120.06/4,305.63 = 1,722.78/x
  3. Step 3: Cross multiply
    3,120.06x = 4,305.63 × 1,722.78
  4. Step 4: Simplify right side
    3,120.06x = 7,417,653.25
  5. Step 5: Solve for x
    x = 7,417,653.25/3,120.06
  6. Step 6: Final answer
    x = 2,377.41

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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.