Home / 1,190.88-1,786.20-325.28

Finding the Fourth Proportional to 1,190.88, 1,786.20 and 325.28

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Solution

The fourth proportional to 1,190.88, 1,786.20 and 325.28 is: 487.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.88 : 1,786.20 = 325.28 : x
  2. Step 2: Convert to fraction form
    1,190.88/1,786.20 = 325.28/x
  3. Step 3: Cross multiply
    1,190.88x = 1,786.20 × 325.28
  4. Step 4: Simplify right side
    1,190.88x = 581,015.14
  5. Step 5: Solve for x
    x = 581,015.14/1,190.88
  6. Step 6: Final answer
    x = 487.89

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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.