Home / 1,986.15-2,739.66-1,277.76

Finding the Fourth Proportional to 1,986.15, 2,739.66 and 1,277.76

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Solution

The fourth proportional to 1,986.15, 2,739.66 and 1,277.76 is: 1,762.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.15 : 2,739.66 = 1,277.76 : x
  2. Step 2: Convert to fraction form
    1,986.15/2,739.66 = 1,277.76/x
  3. Step 3: Cross multiply
    1,986.15x = 2,739.66 × 1,277.76
  4. Step 4: Simplify right side
    1,986.15x = 3,500,627.96
  5. Step 5: Solve for x
    x = 3,500,627.96/1,986.15
  6. Step 6: Final answer
    x = 1,762.52

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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.