Home / 1,188.90-1,792.26-1,109.61

Finding the Fourth Proportional to 1,188.90, 1,792.26 and 1,109.61

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Solution

The fourth proportional to 1,188.90, 1,792.26 and 1,109.61 is: 1,672.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.90 : 1,792.26 = 1,109.61 : x
  2. Step 2: Convert to fraction form
    1,188.90/1,792.26 = 1,109.61/x
  3. Step 3: Cross multiply
    1,188.90x = 1,792.26 × 1,109.61
  4. Step 4: Simplify right side
    1,188.90x = 1,988,709.62
  5. Step 5: Solve for x
    x = 1,988,709.62/1,188.90
  6. Step 6: Final answer
    x = 1,672.73

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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.