Home / 1,391.11-2,086.67-982.42

Finding the Fourth Proportional to 1,391.11, 2,086.67 and 982.42

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Solution

The fourth proportional to 1,391.11, 2,086.67 and 982.42 is: 1,473.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.11 : 2,086.67 = 982.42 : x
  2. Step 2: Convert to fraction form
    1,391.11/2,086.67 = 982.42/x
  3. Step 3: Cross multiply
    1,391.11x = 2,086.67 × 982.42
  4. Step 4: Simplify right side
    1,391.11x = 2,049,986.34
  5. Step 5: Solve for x
    x = 2,049,986.34/1,391.11
  6. Step 6: Final answer
    x = 1,473.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.