Home / 1,986.90-2,977.92-1,119.39

Finding the Fourth Proportional to 1,986.90, 2,977.92 and 1,119.39

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Solution

The fourth proportional to 1,986.90, 2,977.92 and 1,119.39 is: 1,677.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.90 : 2,977.92 = 1,119.39 : x
  2. Step 2: Convert to fraction form
    1,986.90/2,977.92 = 1,119.39/x
  3. Step 3: Cross multiply
    1,986.90x = 2,977.92 × 1,119.39
  4. Step 4: Simplify right side
    1,986.90x = 3,333,453.87
  5. Step 5: Solve for x
    x = 3,333,453.87/1,986.90
  6. Step 6: Final answer
    x = 1,677.72

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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.