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Finding the Fourth Proportional to 982.11, 1,355.27 and 539.97

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Solution

The fourth proportional to 982.11, 1,355.27 and 539.97 is: 745.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.11 : 1,355.27 = 539.97 : x
  2. Step 2: Convert to fraction form
    982.11/1,355.27 = 539.97/x
  3. Step 3: Cross multiply
    982.11x = 1,355.27 × 539.97
  4. Step 4: Simplify right side
    982.11x = 731,805.14
  5. Step 5: Solve for x
    x = 731,805.14/982.11
  6. Step 6: Final answer
    x = 745.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.