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Finding the Fourth Proportional to 1,190.81, 1,786.25 and 369.07

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Solution

The fourth proportional to 1,190.81, 1,786.25 and 369.07 is: 553.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.81 : 1,786.25 = 369.07 : x
  2. Step 2: Convert to fraction form
    1,190.81/1,786.25 = 369.07/x
  3. Step 3: Cross multiply
    1,190.81x = 1,786.25 × 369.07
  4. Step 4: Simplify right side
    1,190.81x = 659,251.29
  5. Step 5: Solve for x
    x = 659,251.29/1,190.81
  6. Step 6: Final answer
    x = 553.62

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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.