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Finding the Fourth Proportional to 1,657.44, 2,486.46 and 791.75

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Solution

The fourth proportional to 1,657.44, 2,486.46 and 791.75 is: 1,187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.44 : 2,486.46 = 791.75 : x
  2. Step 2: Convert to fraction form
    1,657.44/2,486.46 = 791.75/x
  3. Step 3: Cross multiply
    1,657.44x = 2,486.46 × 791.75
  4. Step 4: Simplify right side
    1,657.44x = 1,968,654.71
  5. Step 5: Solve for x
    x = 1,968,654.71/1,657.44
  6. Step 6: Final answer
    x = 1,187.77

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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.