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Finding the Fourth Proportional to 865.22, 1,193.77 and 492.14

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Solution

The fourth proportional to 865.22, 1,193.77 and 492.14 is: 679.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.22 : 1,193.77 = 492.14 : x
  2. Step 2: Convert to fraction form
    865.22/1,193.77 = 492.14/x
  3. Step 3: Cross multiply
    865.22x = 1,193.77 × 492.14
  4. Step 4: Simplify right side
    865.22x = 587,505.57
  5. Step 5: Solve for x
    x = 587,505.57/865.22
  6. Step 6: Final answer
    x = 679.03

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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.