Home / 1,971.51-2,720.69-1,185.57

Finding the Fourth Proportional to 1,971.51, 2,720.69 and 1,185.57

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Solution

The fourth proportional to 1,971.51, 2,720.69 and 1,185.57 is: 1,636.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.51 : 2,720.69 = 1,185.57 : x
  2. Step 2: Convert to fraction form
    1,971.51/2,720.69 = 1,185.57/x
  3. Step 3: Cross multiply
    1,971.51x = 2,720.69 × 1,185.57
  4. Step 4: Simplify right side
    1,971.51x = 3,225,568.44
  5. Step 5: Solve for x
    x = 3,225,568.44/1,971.51
  6. Step 6: Final answer
    x = 1,636.09

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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.