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Finding the Fourth Proportional to 791.77, 1,186.50 and 544.72

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Solution

The fourth proportional to 791.77, 1,186.50 and 544.72 is: 816.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.77 : 1,186.50 = 544.72 : x
  2. Step 2: Convert to fraction form
    791.77/1,186.50 = 544.72/x
  3. Step 3: Cross multiply
    791.77x = 1,186.50 × 544.72
  4. Step 4: Simplify right side
    791.77x = 646,304.35
  5. Step 5: Solve for x
    x = 646,304.35/791.77
  6. Step 6: Final answer
    x = 816.28

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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.