Home / 1,986.61-2,741.31-1,102.20

Finding the Fourth Proportional to 1,986.61, 2,741.31 and 1,102.20

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Solution

The fourth proportional to 1,986.61, 2,741.31 and 1,102.20 is: 1,520.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.61 : 2,741.31 = 1,102.20 : x
  2. Step 2: Convert to fraction form
    1,986.61/2,741.31 = 1,102.20/x
  3. Step 3: Cross multiply
    1,986.61x = 2,741.31 × 1,102.20
  4. Step 4: Simplify right side
    1,986.61x = 3,021,471.88
  5. Step 5: Solve for x
    x = 3,021,471.88/1,986.61
  6. Step 6: Final answer
    x = 1,520.92

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1.5x scale

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.