Home / 1,971.87-2,721.12-1,185.77

Finding the Fourth Proportional to 1,971.87, 2,721.12 and 1,185.77

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Solution

The fourth proportional to 1,971.87, 2,721.12 and 1,185.77 is: 1,636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.87 : 2,721.12 = 1,185.77 : x
  2. Step 2: Convert to fraction form
    1,971.87/2,721.12 = 1,185.77/x
  3. Step 3: Cross multiply
    1,971.87x = 2,721.12 × 1,185.77
  4. Step 4: Simplify right side
    1,971.87x = 3,226,608.86
  5. Step 5: Solve for x
    x = 3,226,608.86/1,971.87
  6. Step 6: Final answer
    x = 1,636.32

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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.