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Finding the Fourth Proportional to 1,190.36, 1,785.54 and 539.12

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Solution

The fourth proportional to 1,190.36, 1,785.54 and 539.12 is: 808.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.36 : 1,785.54 = 539.12 : x
  2. Step 2: Convert to fraction form
    1,190.36/1,785.54 = 539.12/x
  3. Step 3: Cross multiply
    1,190.36x = 1,785.54 × 539.12
  4. Step 4: Simplify right side
    1,190.36x = 962,620.32
  5. Step 5: Solve for x
    x = 962,620.32/1,190.36
  6. Step 6: Final answer
    x = 808.68

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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.