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Finding the Fourth Proportional to 603.60, 905.37 and 213.48

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Solution

The fourth proportional to 603.60, 905.37 and 213.48 is: 320.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.60 : 905.37 = 213.48 : x
  2. Step 2: Convert to fraction form
    603.60/905.37 = 213.48/x
  3. Step 3: Cross multiply
    603.60x = 905.37 × 213.48
  4. Step 4: Simplify right side
    603.60x = 193,278.39
  5. Step 5: Solve for x
    x = 193,278.39/603.60
  6. Step 6: Final answer
    x = 320.21

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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.