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Finding the Fourth Proportional to 791.25, 1,185.30 and 617.08

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Solution

The fourth proportional to 791.25, 1,185.30 and 617.08 is: 924.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.25 : 1,185.30 = 617.08 : x
  2. Step 2: Convert to fraction form
    791.25/1,185.30 = 617.08/x
  3. Step 3: Cross multiply
    791.25x = 1,185.30 × 617.08
  4. Step 4: Simplify right side
    791.25x = 731,424.92
  5. Step 5: Solve for x
    x = 731,424.92/791.25
  6. Step 6: Final answer
    x = 924.39

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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.