Home / 1,190.88-1,786.38-325.20

Finding the Fourth Proportional to 1,190.88, 1,786.38 and 325.20

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Solution

The fourth proportional to 1,190.88, 1,786.38 and 325.20 is: 487.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.88 : 1,786.38 = 325.20 : x
  2. Step 2: Convert to fraction form
    1,190.88/1,786.38 = 325.20/x
  3. Step 3: Cross multiply
    1,190.88x = 1,786.38 × 325.20
  4. Step 4: Simplify right side
    1,190.88x = 580,930.78
  5. Step 5: Solve for x
    x = 580,930.78/1,190.88
  6. Step 6: Final answer
    x = 487.82

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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.