Home / 2,999.39-4,139.78-2,057.09

Finding the Fourth Proportional to 2,999.39, 4,139.78 and 2,057.09

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Solution

The fourth proportional to 2,999.39, 4,139.78 and 2,057.09 is: 2,839.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,999.39 : 4,139.78 = 2,057.09 : x
  2. Step 2: Convert to fraction form
    2,999.39/4,139.78 = 2,057.09/x
  3. Step 3: Cross multiply
    2,999.39x = 4,139.78 × 2,057.09
  4. Step 4: Simplify right side
    2,999.39x = 8,515,869.06
  5. Step 5: Solve for x
    x = 8,515,869.06/2,999.39
  6. Step 6: Final answer
    x = 2,839.21

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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.