Home / 3,390.09-5,078.79-1,999.28

Finding the Fourth Proportional to 3,390.09, 5,078.79 and 1,999.28

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Solution

The fourth proportional to 3,390.09, 5,078.79 and 1,999.28 is: 2,995.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.09 : 5,078.79 = 1,999.28 : x
  2. Step 2: Convert to fraction form
    3,390.09/5,078.79 = 1,999.28/x
  3. Step 3: Cross multiply
    3,390.09x = 5,078.79 × 1,999.28
  4. Step 4: Simplify right side
    3,390.09x = 10,153,897.88
  5. Step 5: Solve for x
    x = 10,153,897.88/3,390.09
  6. Step 6: Final answer
    x = 2,995.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.