Home / 1,986.60-2,740.62-1,200.18

Finding the Fourth Proportional to 1,986.60, 2,740.62 and 1,200.18

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Solution

The fourth proportional to 1,986.60, 2,740.62 and 1,200.18 is: 1,655.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.60 : 2,740.62 = 1,200.18 : x
  2. Step 2: Convert to fraction form
    1,986.60/2,740.62 = 1,200.18/x
  3. Step 3: Cross multiply
    1,986.60x = 2,740.62 × 1,200.18
  4. Step 4: Simplify right side
    1,986.60x = 3,289,237.31
  5. Step 5: Solve for x
    x = 3,289,237.31/1,986.60
  6. Step 6: Final answer
    x = 1,655.71

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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.