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Finding the Fourth Proportional to 792.52, 1,092.95 and 493.39

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Solution

The fourth proportional to 792.52, 1,092.95 and 493.39 is: 680.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.52 : 1,092.95 = 493.39 : x
  2. Step 2: Convert to fraction form
    792.52/1,092.95 = 493.39/x
  3. Step 3: Cross multiply
    792.52x = 1,092.95 × 493.39
  4. Step 4: Simplify right side
    792.52x = 539,250.60
  5. Step 5: Solve for x
    x = 539,250.60/792.52
  6. Step 6: Final answer
    x = 680.43

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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.