Home / 1,986.11-2,740.90-1,200

Finding the Fourth Proportional to 1,986.11, 2,740.90 and 1,200

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Solution

The fourth proportional to 1,986.11, 2,740.90 and 1,200 is: 1,656.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.11 : 2,740.90 = 1,200 : x
  2. Step 2: Convert to fraction form
    1,986.11/2,740.90 = 1,200/x
  3. Step 3: Cross multiply
    1,986.11x = 2,740.90 × 1,200
  4. Step 4: Simplify right side
    1,986.11x = 3,289,080
  5. Step 5: Solve for x
    x = 3,289,080/1,986.11
  6. Step 6: Final answer
    x = 1,656.04

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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.