Home / 1,091.40-1,645.26-1,081.68

Finding the Fourth Proportional to 1,091.40, 1,645.26 and 1,081.68

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Solution

The fourth proportional to 1,091.40, 1,645.26 and 1,081.68 is: 1,630.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.40 : 1,645.26 = 1,081.68 : x
  2. Step 2: Convert to fraction form
    1,091.40/1,645.26 = 1,081.68/x
  3. Step 3: Cross multiply
    1,091.40x = 1,645.26 × 1,081.68
  4. Step 4: Simplify right side
    1,091.40x = 1,779,644.84
  5. Step 5: Solve for x
    x = 1,779,644.84/1,091.40
  6. Step 6: Final answer
    x = 1,630.61

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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.