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Finding the Fourth Proportional to 235.72, 351.86 and 216.46

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Solution

The fourth proportional to 235.72, 351.86 and 216.46 is: 323.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.72 : 351.86 = 216.46 : x
  2. Step 2: Convert to fraction form
    235.72/351.86 = 216.46/x
  3. Step 3: Cross multiply
    235.72x = 351.86 × 216.46
  4. Step 4: Simplify right side
    235.72x = 76,163.62
  5. Step 5: Solve for x
    x = 76,163.62/235.72
  6. Step 6: Final answer
    x = 323.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.