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Finding the Fourth Proportional to 603.17, 905.19 and 218.42

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Solution

The fourth proportional to 603.17, 905.19 and 218.42 is: 327.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.17 : 905.19 = 218.42 : x
  2. Step 2: Convert to fraction form
    603.17/905.19 = 218.42/x
  3. Step 3: Cross multiply
    603.17x = 905.19 × 218.42
  4. Step 4: Simplify right side
    603.17x = 197,711.60
  5. Step 5: Solve for x
    x = 197,711.60/603.17
  6. Step 6: Final answer
    x = 327.79

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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.