Home / 1,986.13-2,739.85-1,240.66

Finding the Fourth Proportional to 1,986.13, 2,739.85 and 1,240.66

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Solution

The fourth proportional to 1,986.13, 2,739.85 and 1,240.66 is: 1,711.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.13 : 2,739.85 = 1,240.66 : x
  2. Step 2: Convert to fraction form
    1,986.13/2,739.85 = 1,240.66/x
  3. Step 3: Cross multiply
    1,986.13x = 2,739.85 × 1,240.66
  4. Step 4: Simplify right side
    1,986.13x = 3,399,222.30
  5. Step 5: Solve for x
    x = 3,399,222.30/1,986.13
  6. Step 6: Final answer
    x = 1,711.48

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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.