Home / 1,986.64-2,979.92-1,170.09

Finding the Fourth Proportional to 1,986.64, 2,979.92 and 1,170.09

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Solution

The fourth proportional to 1,986.64, 2,979.92 and 1,170.09 is: 1,755.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.64 : 2,979.92 = 1,170.09 : x
  2. Step 2: Convert to fraction form
    1,986.64/2,979.92 = 1,170.09/x
  3. Step 3: Cross multiply
    1,986.64x = 2,979.92 × 1,170.09
  4. Step 4: Simplify right side
    1,986.64x = 3,486,776.19
  5. Step 5: Solve for x
    x = 3,486,776.19/1,986.64
  6. Step 6: Final answer
    x = 1,755.11

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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.