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Finding the Fourth Proportional to 865.59, 1,194.62 and 492.61

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Solution

The fourth proportional to 865.59, 1,194.62 and 492.61 is: 679.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.59 : 1,194.62 = 492.61 : x
  2. Step 2: Convert to fraction form
    865.59/1,194.62 = 492.61/x
  3. Step 3: Cross multiply
    865.59x = 1,194.62 × 492.61
  4. Step 4: Simplify right side
    865.59x = 588,481.76
  5. Step 5: Solve for x
    x = 588,481.76/865.59
  6. Step 6: Final answer
    x = 679.86

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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.