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Finding the Fourth Proportional to 1,350.96, 1,864 and 791.36

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Solution

The fourth proportional to 1,350.96, 1,864 and 791.36 is: 1,091.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.96 : 1,864 = 791.36 : x
  2. Step 2: Convert to fraction form
    1,350.96/1,864 = 791.36/x
  3. Step 3: Cross multiply
    1,350.96x = 1,864 × 791.36
  4. Step 4: Simplify right side
    1,350.96x = 1,475,095.04
  5. Step 5: Solve for x
    x = 1,475,095.04/1,350.96
  6. Step 6: Final answer
    x = 1,091.89

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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.