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Finding the Fourth Proportional to 217.63, 324.35 and 217.29

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Solution

The fourth proportional to 217.63, 324.35 and 217.29 is: 323.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.63 : 324.35 = 217.29 : x
  2. Step 2: Convert to fraction form
    217.63/324.35 = 217.29/x
  3. Step 3: Cross multiply
    217.63x = 324.35 × 217.29
  4. Step 4: Simplify right side
    217.63x = 70,478.01
  5. Step 5: Solve for x
    x = 70,478.01/217.63
  6. Step 6: Final answer
    x = 323.84

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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.