Home / 2,131.80-2,941.92-1,187.66

Finding the Fourth Proportional to 2,131.80, 2,941.92 and 1,187.66

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Solution

The fourth proportional to 2,131.80, 2,941.92 and 1,187.66 is: 1,638.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.80 : 2,941.92 = 1,187.66 : x
  2. Step 2: Convert to fraction form
    2,131.80/2,941.92 = 1,187.66/x
  3. Step 3: Cross multiply
    2,131.80x = 2,941.92 × 1,187.66
  4. Step 4: Simplify right side
    2,131.80x = 3,493,986.00
  5. Step 5: Solve for x
    x = 3,493,986.00/2,131.80
  6. Step 6: Final answer
    x = 1,638.98

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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.