Home / 1,971.57-2,720.76-1,185.66

Finding the Fourth Proportional to 1,971.57, 2,720.76 and 1,185.66

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Solution

The fourth proportional to 1,971.57, 2,720.76 and 1,185.66 is: 1,636.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.57 : 2,720.76 = 1,185.66 : x
  2. Step 2: Convert to fraction form
    1,971.57/2,720.76 = 1,185.66/x
  3. Step 3: Cross multiply
    1,971.57x = 2,720.76 × 1,185.66
  4. Step 4: Simplify right side
    1,971.57x = 3,225,896.30
  5. Step 5: Solve for x
    x = 3,225,896.30/1,971.57
  6. Step 6: Final answer
    x = 1,636.21

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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.