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Finding the Fourth Proportional to 1,190.36, 1,785.96 and 540.68

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Solution

The fourth proportional to 1,190.36, 1,785.96 and 540.68 is: 811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.36 : 1,785.96 = 540.68 : x
  2. Step 2: Convert to fraction form
    1,190.36/1,785.96 = 540.68/x
  3. Step 3: Cross multiply
    1,190.36x = 1,785.96 × 540.68
  4. Step 4: Simplify right side
    1,190.36x = 965,632.85
  5. Step 5: Solve for x
    x = 965,632.85/1,190.36
  6. Step 6: Final answer
    x = 811.21

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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.