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Finding the Fourth Proportional to 436.29, 654.80 and 217.23

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Solution

The fourth proportional to 436.29, 654.80 and 217.23 is: 326.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.29 : 654.80 = 217.23 : x
  2. Step 2: Convert to fraction form
    436.29/654.80 = 217.23/x
  3. Step 3: Cross multiply
    436.29x = 654.80 × 217.23
  4. Step 4: Simplify right side
    436.29x = 142,241.12
  5. Step 5: Solve for x
    x = 142,241.12/436.29
  6. Step 6: Final answer
    x = 326.02

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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.