Home / 1,986.63-2,741.68-1,147.49

Finding the Fourth Proportional to 1,986.63, 2,741.68 and 1,147.49

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Solution

The fourth proportional to 1,986.63, 2,741.68 and 1,147.49 is: 1,583.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.63 : 2,741.68 = 1,147.49 : x
  2. Step 2: Convert to fraction form
    1,986.63/2,741.68 = 1,147.49/x
  3. Step 3: Cross multiply
    1,986.63x = 2,741.68 × 1,147.49
  4. Step 4: Simplify right side
    1,986.63x = 3,146,030.94
  5. Step 5: Solve for x
    x = 3,146,030.94/1,986.63
  6. Step 6: Final answer
    x = 1,583.60

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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.