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Finding the Fourth Proportional to 603.97, 906.03 and 213.90

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Solution

The fourth proportional to 603.97, 906.03 and 213.90 is: 320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.97 : 906.03 = 213.90 : x
  2. Step 2: Convert to fraction form
    603.97/906.03 = 213.90/x
  3. Step 3: Cross multiply
    603.97x = 906.03 × 213.90
  4. Step 4: Simplify right side
    603.97x = 193,797.92
  5. Step 5: Solve for x
    x = 193,797.92/603.97
  6. Step 6: Final answer
    x = 320.87

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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.