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Finding the Fourth Proportional to 2,189.97, 3,284.96 and 728.79

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Solution

The fourth proportional to 2,189.97, 3,284.96 and 728.79 is: 1,093.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.97 : 3,284.96 = 728.79 : x
  2. Step 2: Convert to fraction form
    2,189.97/3,284.96 = 728.79/x
  3. Step 3: Cross multiply
    2,189.97x = 3,284.96 × 728.79
  4. Step 4: Simplify right side
    2,189.97x = 2,394,042.35
  5. Step 5: Solve for x
    x = 2,394,042.35/2,189.97
  6. Step 6: Final answer
    x = 1,093.19

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1.5x scale

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.