Home / 1,990.31-2,964.44-1,886.23

Finding the Fourth Proportional to 1,990.31, 2,964.44 and 1,886.23

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Solution

The fourth proportional to 1,990.31, 2,964.44 and 1,886.23 is: 2,809.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.31 : 2,964.44 = 1,886.23 : x
  2. Step 2: Convert to fraction form
    1,990.31/2,964.44 = 1,886.23/x
  3. Step 3: Cross multiply
    1,990.31x = 2,964.44 × 1,886.23
  4. Step 4: Simplify right side
    1,990.31x = 5,591,616.50
  5. Step 5: Solve for x
    x = 5,591,616.50/1,990.31
  6. Step 6: Final answer
    x = 2,809.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.