Home / 1,261.73-1,895.72-1,191.80

Finding the Fourth Proportional to 1,261.73, 1,895.72 and 1,191.80

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Solution

The fourth proportional to 1,261.73, 1,895.72 and 1,191.80 is: 1,790.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.73 : 1,895.72 = 1,191.80 : x
  2. Step 2: Convert to fraction form
    1,261.73/1,895.72 = 1,191.80/x
  3. Step 3: Cross multiply
    1,261.73x = 1,895.72 × 1,191.80
  4. Step 4: Simplify right side
    1,261.73x = 2,259,317.88
  5. Step 5: Solve for x
    x = 2,259,317.88/1,261.73
  6. Step 6: Final answer
    x = 1,790.65

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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.