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Finding the Fourth Proportional to 494.75, 742.19 and 220.92

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Solution

The fourth proportional to 494.75, 742.19 and 220.92 is: 331.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.75 : 742.19 = 220.92 : x
  2. Step 2: Convert to fraction form
    494.75/742.19 = 220.92/x
  3. Step 3: Cross multiply
    494.75x = 742.19 × 220.92
  4. Step 4: Simplify right side
    494.75x = 163,963.51
  5. Step 5: Solve for x
    x = 163,963.51/494.75
  6. Step 6: Final answer
    x = 331.41

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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.