Home / 2,131.62-2,941.79-1,187.48

Finding the Fourth Proportional to 2,131.62, 2,941.79 and 1,187.48

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Solution

The fourth proportional to 2,131.62, 2,941.79 and 1,187.48 is: 1,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.62 : 2,941.79 = 1,187.48 : x
  2. Step 2: Convert to fraction form
    2,131.62/2,941.79 = 1,187.48/x
  3. Step 3: Cross multiply
    2,131.62x = 2,941.79 × 1,187.48
  4. Step 4: Simplify right side
    2,131.62x = 3,493,296.14
  5. Step 5: Solve for x
    x = 3,493,296.14/2,131.62
  6. Step 6: Final answer
    x = 1,638.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.