Home / 3,120.14-4,305.78-1,722.90

Finding the Fourth Proportional to 3,120.14, 4,305.78 and 1,722.90

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Solution

The fourth proportional to 3,120.14, 4,305.78 and 1,722.90 is: 2,377.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.14 : 4,305.78 = 1,722.90 : x
  2. Step 2: Convert to fraction form
    3,120.14/4,305.78 = 1,722.90/x
  3. Step 3: Cross multiply
    3,120.14x = 4,305.78 × 1,722.90
  4. Step 4: Simplify right side
    3,120.14x = 7,418,428.36
  5. Step 5: Solve for x
    x = 7,418,428.36/3,120.14
  6. Step 6: Final answer
    x = 2,377.59

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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.