Home / 1,186.19-1,777.55-839.33

Finding the Fourth Proportional to 1,186.19, 1,777.55 and 839.33

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Solution

The fourth proportional to 1,186.19, 1,777.55 and 839.33 is: 1,257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.19 : 1,777.55 = 839.33 : x
  2. Step 2: Convert to fraction form
    1,186.19/1,777.55 = 839.33/x
  3. Step 3: Cross multiply
    1,186.19x = 1,777.55 × 839.33
  4. Step 4: Simplify right side
    1,186.19x = 1,491,960.52
  5. Step 5: Solve for x
    x = 1,491,960.52/1,186.19
  6. Step 6: Final answer
    x = 1,257.78

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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.