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Finding the Fourth Proportional to 1,104.23, 1,654.97 and 518.90

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Solution

The fourth proportional to 1,104.23, 1,654.97 and 518.90 is: 777.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.23 : 1,654.97 = 518.90 : x
  2. Step 2: Convert to fraction form
    1,104.23/1,654.97 = 518.90/x
  3. Step 3: Cross multiply
    1,104.23x = 1,654.97 × 518.90
  4. Step 4: Simplify right side
    1,104.23x = 858,763.93
  5. Step 5: Solve for x
    x = 858,763.93/1,104.23
  6. Step 6: Final answer
    x = 777.71

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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.