Home / 1,986.42-2,741.13-1,200.90

Finding the Fourth Proportional to 1,986.42, 2,741.13 and 1,200.90

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Solution

The fourth proportional to 1,986.42, 2,741.13 and 1,200.90 is: 1,657.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.42 : 2,741.13 = 1,200.90 : x
  2. Step 2: Convert to fraction form
    1,986.42/2,741.13 = 1,200.90/x
  3. Step 3: Cross multiply
    1,986.42x = 2,741.13 × 1,200.90
  4. Step 4: Simplify right side
    1,986.42x = 3,291,823.02
  5. Step 5: Solve for x
    x = 3,291,823.02/1,986.42
  6. Step 6: Final answer
    x = 1,657.16

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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.