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Finding the Fourth Proportional to 791.72, 1,092.72 and 442.52

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Solution

The fourth proportional to 791.72, 1,092.72 and 442.52 is: 610.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.72 : 1,092.72 = 442.52 : x
  2. Step 2: Convert to fraction form
    791.72/1,092.72 = 442.52/x
  3. Step 3: Cross multiply
    791.72x = 1,092.72 × 442.52
  4. Step 4: Simplify right side
    791.72x = 483,550.45
  5. Step 5: Solve for x
    x = 483,550.45/791.72
  6. Step 6: Final answer
    x = 610.76

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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.