Home / 1,986.30-2,741.10-1,200.20

Finding the Fourth Proportional to 1,986.30, 2,741.10 and 1,200.20

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Solution

The fourth proportional to 1,986.30, 2,741.10 and 1,200.20 is: 1,656.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.30 : 2,741.10 = 1,200.20 : x
  2. Step 2: Convert to fraction form
    1,986.30/2,741.10 = 1,200.20/x
  3. Step 3: Cross multiply
    1,986.30x = 2,741.10 × 1,200.20
  4. Step 4: Simplify right side
    1,986.30x = 3,289,854.51
  5. Step 5: Solve for x
    x = 3,289,854.51/1,986.30
  6. Step 6: Final answer
    x = 1,656.27

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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.