Home / 1,990.44-2,991.06-1,345.14

Finding the Fourth Proportional to 1,990.44, 2,991.06 and 1,345.14

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Solution

The fourth proportional to 1,990.44, 2,991.06 and 1,345.14 is: 2,021.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.44 : 2,991.06 = 1,345.14 : x
  2. Step 2: Convert to fraction form
    1,990.44/2,991.06 = 1,345.14/x
  3. Step 3: Cross multiply
    1,990.44x = 2,991.06 × 1,345.14
  4. Step 4: Simplify right side
    1,990.44x = 4,023,394.45
  5. Step 5: Solve for x
    x = 4,023,394.45/1,990.44
  6. Step 6: Final answer
    x = 2,021.36

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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.