Home / 1,986.72-2,741.80-1,147.58

Finding the Fourth Proportional to 1,986.72, 2,741.80 and 1,147.58

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Solution

The fourth proportional to 1,986.72, 2,741.80 and 1,147.58 is: 1,583.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.72 : 2,741.80 = 1,147.58 : x
  2. Step 2: Convert to fraction form
    1,986.72/2,741.80 = 1,147.58/x
  3. Step 3: Cross multiply
    1,986.72x = 2,741.80 × 1,147.58
  4. Step 4: Simplify right side
    1,986.72x = 3,146,434.84
  5. Step 5: Solve for x
    x = 3,146,434.84/1,986.72
  6. Step 6: Final answer
    x = 1,583.73

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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.