Home / 2,940.69-4,055.30-1,985.70

Finding the Fourth Proportional to 2,940.69, 4,055.30 and 1,985.70

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Solution

The fourth proportional to 2,940.69, 4,055.30 and 1,985.70 is: 2,738.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.69 : 4,055.30 = 1,985.70 : x
  2. Step 2: Convert to fraction form
    2,940.69/4,055.30 = 1,985.70/x
  3. Step 3: Cross multiply
    2,940.69x = 4,055.30 × 1,985.70
  4. Step 4: Simplify right side
    2,940.69x = 8,052,609.21
  5. Step 5: Solve for x
    x = 8,052,609.21/2,940.69
  6. Step 6: Final answer
    x = 2,738.34

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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.