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Finding the Fourth Proportional to 1,998.50, 2,757.96 and 1,170.50

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Solution

The fourth proportional to 1,998.50, 2,757.96 and 1,170.50 is: 1,615.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.50 : 2,757.96 = 1,170.50 : x
  2. Step 2: Convert to fraction form
    1,998.50/2,757.96 = 1,170.50/x
  3. Step 3: Cross multiply
    1,998.50x = 2,757.96 × 1,170.50
  4. Step 4: Simplify right side
    1,998.50x = 3,228,192.18
  5. Step 5: Solve for x
    x = 3,228,192.18/1,998.50
  6. Step 6: Final answer
    x = 1,615.31

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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.