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Finding the Fourth Proportional to 2,188.59, 3,282.92 and 727.75

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Solution

The fourth proportional to 2,188.59, 3,282.92 and 727.75 is: 1,091.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.59 : 3,282.92 = 727.75 : x
  2. Step 2: Convert to fraction form
    2,188.59/3,282.92 = 727.75/x
  3. Step 3: Cross multiply
    2,188.59x = 3,282.92 × 727.75
  4. Step 4: Simplify right side
    2,188.59x = 2,389,133.52
  5. Step 5: Solve for x
    x = 2,389,133.52/2,188.59
  6. Step 6: Final answer
    x = 1,091.63

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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.