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Finding the Fourth Proportional to 982.00, 1,355.09 and 539.88

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Solution

The fourth proportional to 982.00, 1,355.09 and 539.88 is: 744.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.00 : 1,355.09 = 539.88 : x
  2. Step 2: Convert to fraction form
    982.00/1,355.09 = 539.88/x
  3. Step 3: Cross multiply
    982.00x = 1,355.09 × 539.88
  4. Step 4: Simplify right side
    982.00x = 731,577.86
  5. Step 5: Solve for x
    x = 731,577.86/982.00
  6. Step 6: Final answer
    x = 744.99

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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.