Home / 1,986.09-2,738.70-1,707.21

Finding the Fourth Proportional to 1,986.09, 2,738.70 and 1,707.21

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Solution

The fourth proportional to 1,986.09, 2,738.70 and 1,707.21 is: 2,354.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.09 : 2,738.70 = 1,707.21 : x
  2. Step 2: Convert to fraction form
    1,986.09/2,738.70 = 1,707.21/x
  3. Step 3: Cross multiply
    1,986.09x = 2,738.70 × 1,707.21
  4. Step 4: Simplify right side
    1,986.09x = 4,675,536.03
  5. Step 5: Solve for x
    x = 4,675,536.03/1,986.09
  6. Step 6: Final answer
    x = 2,354.14

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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.