Home / 1,986.15-2,741.18-1,277.76

Finding the Fourth Proportional to 1,986.15, 2,741.18 and 1,277.76

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Solution

The fourth proportional to 1,986.15, 2,741.18 and 1,277.76 is: 1,763.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.15 : 2,741.18 = 1,277.76 : x
  2. Step 2: Convert to fraction form
    1,986.15/2,741.18 = 1,277.76/x
  3. Step 3: Cross multiply
    1,986.15x = 2,741.18 × 1,277.76
  4. Step 4: Simplify right side
    1,986.15x = 3,502,563.77
  5. Step 5: Solve for x
    x = 3,502,563.77/1,986.15
  6. Step 6: Final answer
    x = 1,763.49

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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.