Home / 1,918.80-2,647.96-1,079.56

Finding the Fourth Proportional to 1,918.80, 2,647.96 and 1,079.56

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Solution

The fourth proportional to 1,918.80, 2,647.96 and 1,079.56 is: 1,489.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.80 : 2,647.96 = 1,079.56 : x
  2. Step 2: Convert to fraction form
    1,918.80/2,647.96 = 1,079.56/x
  3. Step 3: Cross multiply
    1,918.80x = 2,647.96 × 1,079.56
  4. Step 4: Simplify right side
    1,918.80x = 2,858,631.70
  5. Step 5: Solve for x
    x = 2,858,631.70/1,918.80
  6. Step 6: Final answer
    x = 1,489.80

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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.