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Finding the Fourth Proportional to 216.44, 326.25 and 203.90

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Solution

The fourth proportional to 216.44, 326.25 and 203.90 is: 307.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.44 : 326.25 = 203.90 : x
  2. Step 2: Convert to fraction form
    216.44/326.25 = 203.90/x
  3. Step 3: Cross multiply
    216.44x = 326.25 × 203.90
  4. Step 4: Simplify right side
    216.44x = 66,520.74
  5. Step 5: Solve for x
    x = 66,520.74/216.44
  6. Step 6: Final answer
    x = 307.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.