Home / 1,986.31-2,741.07-1,147.02

Finding the Fourth Proportional to 1,986.31, 2,741.07 and 1,147.02

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Solution

The fourth proportional to 1,986.31, 2,741.07 and 1,147.02 is: 1,582.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.31 : 2,741.07 = 1,147.02 : x
  2. Step 2: Convert to fraction form
    1,986.31/2,741.07 = 1,147.02/x
  3. Step 3: Cross multiply
    1,986.31x = 2,741.07 × 1,147.02
  4. Step 4: Simplify right side
    1,986.31x = 3,144,062.11
  5. Step 5: Solve for x
    x = 3,144,062.11/1,986.31
  6. Step 6: Final answer
    x = 1,582.87

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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.