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Finding the Fourth Proportional to 644.70, 965.53 and 446.33

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Solution

The fourth proportional to 644.70, 965.53 and 446.33 is: 668.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.70 : 965.53 = 446.33 : x
  2. Step 2: Convert to fraction form
    644.70/965.53 = 446.33/x
  3. Step 3: Cross multiply
    644.70x = 965.53 × 446.33
  4. Step 4: Simplify right side
    644.70x = 430,940.86
  5. Step 5: Solve for x
    x = 430,940.86/644.70
  6. Step 6: Final answer
    x = 668.44

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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.