Home / 1,986.81-2,741.07-1,200.57

Finding the Fourth Proportional to 1,986.81, 2,741.07 and 1,200.57

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Solution

The fourth proportional to 1,986.81, 2,741.07 and 1,200.57 is: 1,656.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.81 : 2,741.07 = 1,200.57 : x
  2. Step 2: Convert to fraction form
    1,986.81/2,741.07 = 1,200.57/x
  3. Step 3: Cross multiply
    1,986.81x = 2,741.07 × 1,200.57
  4. Step 4: Simplify right side
    1,986.81x = 3,290,846.41
  5. Step 5: Solve for x
    x = 3,290,846.41/1,986.81
  6. Step 6: Final answer
    x = 1,656.35

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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.