Home / 1,912.14-2,868.62-1,090.40

Finding the Fourth Proportional to 1,912.14, 2,868.62 and 1,090.40

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Solution

The fourth proportional to 1,912.14, 2,868.62 and 1,090.40 is: 1,635.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.14 : 2,868.62 = 1,090.40 : x
  2. Step 2: Convert to fraction form
    1,912.14/2,868.62 = 1,090.40/x
  3. Step 3: Cross multiply
    1,912.14x = 2,868.62 × 1,090.40
  4. Step 4: Simplify right side
    1,912.14x = 3,127,923.45
  5. Step 5: Solve for x
    x = 3,127,923.45/1,912.14
  6. Step 6: Final answer
    x = 1,635.82

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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.