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Finding the Fourth Proportional to 1,659.96, 2,489.40 and 793.80

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Solution

The fourth proportional to 1,659.96, 2,489.40 and 793.80 is: 1,190.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.96 : 2,489.40 = 793.80 : x
  2. Step 2: Convert to fraction form
    1,659.96/2,489.40 = 793.80/x
  3. Step 3: Cross multiply
    1,659.96x = 2,489.40 × 793.80
  4. Step 4: Simplify right side
    1,659.96x = 1,976,085.72
  5. Step 5: Solve for x
    x = 1,976,085.72/1,659.96
  6. Step 6: Final answer
    x = 1,190.44

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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.