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Finding the Fourth Proportional to 640.23, 960.49 and 229.41

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Solution

The fourth proportional to 640.23, 960.49 and 229.41 is: 344.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.23 : 960.49 = 229.41 : x
  2. Step 2: Convert to fraction form
    640.23/960.49 = 229.41/x
  3. Step 3: Cross multiply
    640.23x = 960.49 × 229.41
  4. Step 4: Simplify right side
    640.23x = 220,346.01
  5. Step 5: Solve for x
    x = 220,346.01/640.23
  6. Step 6: Final answer
    x = 344.17

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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.