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Finding the Fourth Proportional to 240.25, 331.34 and 215.95

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Solution

The fourth proportional to 240.25, 331.34 and 215.95 is: 297.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.25 : 331.34 = 215.95 : x
  2. Step 2: Convert to fraction form
    240.25/331.34 = 215.95/x
  3. Step 3: Cross multiply
    240.25x = 331.34 × 215.95
  4. Step 4: Simplify right side
    240.25x = 71,550.96
  5. Step 5: Solve for x
    x = 71,550.96/240.25
  6. Step 6: Final answer
    x = 297.82

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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.