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Finding the Fourth Proportional to 837.21, 1,255.70 and 220.96

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Solution

The fourth proportional to 837.21, 1,255.70 and 220.96 is: 331.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.21 : 1,255.70 = 220.96 : x
  2. Step 2: Convert to fraction form
    837.21/1,255.70 = 220.96/x
  3. Step 3: Cross multiply
    837.21x = 1,255.70 × 220.96
  4. Step 4: Simplify right side
    837.21x = 277,456.61
  5. Step 5: Solve for x
    x = 277,456.61/837.21
  6. Step 6: Final answer
    x = 331.41

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1.5x scale

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.