Home / 1,986.11-2,740.85-1,101.92

Finding the Fourth Proportional to 1,986.11, 2,740.85 and 1,101.92

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Solution

The fourth proportional to 1,986.11, 2,740.85 and 1,101.92 is: 1,520.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.11 : 2,740.85 = 1,101.92 : x
  2. Step 2: Convert to fraction form
    1,986.11/2,740.85 = 1,101.92/x
  3. Step 3: Cross multiply
    1,986.11x = 2,740.85 × 1,101.92
  4. Step 4: Simplify right side
    1,986.11x = 3,020,178.22
  5. Step 5: Solve for x
    x = 3,020,178.22/1,986.11
  6. Step 6: Final answer
    x = 1,520.65

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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.