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Finding the Fourth Proportional to 310.89, 465.32 and 217.88

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Solution

The fourth proportional to 310.89, 465.32 and 217.88 is: 326.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.89 : 465.32 = 217.88 : x
  2. Step 2: Convert to fraction form
    310.89/465.32 = 217.88/x
  3. Step 3: Cross multiply
    310.89x = 465.32 × 217.88
  4. Step 4: Simplify right side
    310.89x = 101,383.92
  5. Step 5: Solve for x
    x = 101,383.92/310.89
  6. Step 6: Final answer
    x = 326.11

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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.