Home / 2,190.61-3,288.08-1,326.61

Finding the Fourth Proportional to 2,190.61, 3,288.08 and 1,326.61

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Solution

The fourth proportional to 2,190.61, 3,288.08 and 1,326.61 is: 1,991.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.61 : 3,288.08 = 1,326.61 : x
  2. Step 2: Convert to fraction form
    2,190.61/3,288.08 = 1,326.61/x
  3. Step 3: Cross multiply
    2,190.61x = 3,288.08 × 1,326.61
  4. Step 4: Simplify right side
    2,190.61x = 4,361,999.81
  5. Step 5: Solve for x
    x = 4,361,999.81/2,190.61
  6. Step 6: Final answer
    x = 1,991.23

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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.