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Finding the Fourth Proportional to 2,188.36, 3,282.84 and 727.32

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Solution

The fourth proportional to 2,188.36, 3,282.84 and 727.32 is: 1,091.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.36 : 3,282.84 = 727.32 : x
  2. Step 2: Convert to fraction form
    2,188.36/3,282.84 = 727.32/x
  3. Step 3: Cross multiply
    2,188.36x = 3,282.84 × 727.32
  4. Step 4: Simplify right side
    2,188.36x = 2,387,675.19
  5. Step 5: Solve for x
    x = 2,387,675.19/2,188.36
  6. Step 6: Final answer
    x = 1,091.08

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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.