Home / 1,481.20-2,217.90-1,187.32

Finding the Fourth Proportional to 1,481.20, 2,217.90 and 1,187.32

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Solution

The fourth proportional to 1,481.20, 2,217.90 and 1,187.32 is: 1,777.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.20 : 2,217.90 = 1,187.32 : x
  2. Step 2: Convert to fraction form
    1,481.20/2,217.90 = 1,187.32/x
  3. Step 3: Cross multiply
    1,481.20x = 2,217.90 × 1,187.32
  4. Step 4: Simplify right side
    1,481.20x = 2,633,357.03
  5. Step 5: Solve for x
    x = 2,633,357.03/1,481.20
  6. Step 6: Final answer
    x = 1,777.85

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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.