Home / 1,990.11-2,745.70-1,193.28

Finding the Fourth Proportional to 1,990.11, 2,745.70 and 1,193.28

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Solution

The fourth proportional to 1,990.11, 2,745.70 and 1,193.28 is: 1,646.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.11 : 2,745.70 = 1,193.28 : x
  2. Step 2: Convert to fraction form
    1,990.11/2,745.70 = 1,193.28/x
  3. Step 3: Cross multiply
    1,990.11x = 2,745.70 × 1,193.28
  4. Step 4: Simplify right side
    1,990.11x = 3,276,388.90
  5. Step 5: Solve for x
    x = 3,276,388.90/1,990.11
  6. Step 6: Final answer
    x = 1,646.34

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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.