Home / 1,998.98-2,759.88-1,291.14

Finding the Fourth Proportional to 1,998.98, 2,759.88 and 1,291.14

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Solution

The fourth proportional to 1,998.98, 2,759.88 and 1,291.14 is: 1,782.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.98 : 2,759.88 = 1,291.14 : x
  2. Step 2: Convert to fraction form
    1,998.98/2,759.88 = 1,291.14/x
  3. Step 3: Cross multiply
    1,998.98x = 2,759.88 × 1,291.14
  4. Step 4: Simplify right side
    1,998.98x = 3,563,385.01
  5. Step 5: Solve for x
    x = 3,563,385.01/1,998.98
  6. Step 6: Final answer
    x = 1,782.60

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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.