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Finding the Fourth Proportional to 2,188.69, 3,282.99 and 727.86

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Solution

The fourth proportional to 2,188.69, 3,282.99 and 727.86 is: 1,091.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.69 : 3,282.99 = 727.86 : x
  2. Step 2: Convert to fraction form
    2,188.69/3,282.99 = 727.86/x
  3. Step 3: Cross multiply
    2,188.69x = 3,282.99 × 727.86
  4. Step 4: Simplify right side
    2,188.69x = 2,389,542.06
  5. Step 5: Solve for x
    x = 2,389,542.06/2,188.69
  6. Step 6: Final answer
    x = 1,091.77

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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.