Home / 1,620.21-2,236.77-1,089.87

Finding the Fourth Proportional to 1,620.21, 2,236.77 and 1,089.87

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Solution

The fourth proportional to 1,620.21, 2,236.77 and 1,089.87 is: 1,504.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.21 : 2,236.77 = 1,089.87 : x
  2. Step 2: Convert to fraction form
    1,620.21/2,236.77 = 1,089.87/x
  3. Step 3: Cross multiply
    1,620.21x = 2,236.77 × 1,089.87
  4. Step 4: Simplify right side
    1,620.21x = 2,437,788.52
  5. Step 5: Solve for x
    x = 2,437,788.52/1,620.21
  6. Step 6: Final answer
    x = 1,504.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.