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Finding the Fourth Proportional to 1,171.92, 1,618.20 and 799.68

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Solution

The fourth proportional to 1,171.92, 1,618.20 and 799.68 is: 1,104.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.92 : 1,618.20 = 799.68 : x
  2. Step 2: Convert to fraction form
    1,171.92/1,618.20 = 799.68/x
  3. Step 3: Cross multiply
    1,171.92x = 1,618.20 × 799.68
  4. Step 4: Simplify right side
    1,171.92x = 1,294,042.18
  5. Step 5: Solve for x
    x = 1,294,042.18/1,171.92
  6. Step 6: Final answer
    x = 1,104.21

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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.