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Finding the Fourth Proportional to 1,946.42, 2,917.11 and 791.54

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Solution

The fourth proportional to 1,946.42, 2,917.11 and 791.54 is: 1,186.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.42 : 2,917.11 = 791.54 : x
  2. Step 2: Convert to fraction form
    1,946.42/2,917.11 = 791.54/x
  3. Step 3: Cross multiply
    1,946.42x = 2,917.11 × 791.54
  4. Step 4: Simplify right side
    1,946.42x = 2,309,009.25
  5. Step 5: Solve for x
    x = 2,309,009.25/1,946.42
  6. Step 6: Final answer
    x = 1,186.29

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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.