Home / 1,186.90-1,789.24-1,107.61

Finding the Fourth Proportional to 1,186.90, 1,789.24 and 1,107.61

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Solution

The fourth proportional to 1,186.90, 1,789.24 and 1,107.61 is: 1,669.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.90 : 1,789.24 = 1,107.61 : x
  2. Step 2: Convert to fraction form
    1,186.90/1,789.24 = 1,107.61/x
  3. Step 3: Cross multiply
    1,186.90x = 1,789.24 × 1,107.61
  4. Step 4: Simplify right side
    1,186.90x = 1,981,780.12
  5. Step 5: Solve for x
    x = 1,981,780.12/1,186.90
  6. Step 6: Final answer
    x = 1,669.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.