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Finding the Fourth Proportional to 640.81, 960.98 and 224.29

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Solution

The fourth proportional to 640.81, 960.98 and 224.29 is: 336.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.81 : 960.98 = 224.29 : x
  2. Step 2: Convert to fraction form
    640.81/960.98 = 224.29/x
  3. Step 3: Cross multiply
    640.81x = 960.98 × 224.29
  4. Step 4: Simplify right side
    640.81x = 215,539.55
  5. Step 5: Solve for x
    x = 215,539.55/640.81
  6. Step 6: Final answer
    x = 336.36

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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.