Home / 1,161.06-1,741.75-391.78

Finding the Fourth Proportional to 1,161.06, 1,741.75 and 391.78

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Solution

The fourth proportional to 1,161.06, 1,741.75 and 391.78 is: 587.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.06 : 1,741.75 = 391.78 : x
  2. Step 2: Convert to fraction form
    1,161.06/1,741.75 = 391.78/x
  3. Step 3: Cross multiply
    1,161.06x = 1,741.75 × 391.78
  4. Step 4: Simplify right side
    1,161.06x = 682,382.82
  5. Step 5: Solve for x
    x = 682,382.82/1,161.06
  6. Step 6: Final answer
    x = 587.72

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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.