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Finding the Fourth Proportional to 610.98, 843.15 and 331.21

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Solution

The fourth proportional to 610.98, 843.15 and 331.21 is: 457.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.98 : 843.15 = 331.21 : x
  2. Step 2: Convert to fraction form
    610.98/843.15 = 331.21/x
  3. Step 3: Cross multiply
    610.98x = 843.15 × 331.21
  4. Step 4: Simplify right side
    610.98x = 279,255.57
  5. Step 5: Solve for x
    x = 279,255.57/610.98
  6. Step 6: Final answer
    x = 457.06

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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.