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Finding the Fourth Proportional to 791.00, 1,091.57 and 436.90

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Solution

The fourth proportional to 791.00, 1,091.57 and 436.90 is: 602.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.00 : 1,091.57 = 436.90 : x
  2. Step 2: Convert to fraction form
    791.00/1,091.57 = 436.90/x
  3. Step 3: Cross multiply
    791.00x = 1,091.57 × 436.90
  4. Step 4: Simplify right side
    791.00x = 476,903.62
  5. Step 5: Solve for x
    x = 476,903.62/791.00
  6. Step 6: Final answer
    x = 602.91

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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.