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Finding the Fourth Proportional to 640.70, 961.02 and 332.44

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Solution

The fourth proportional to 640.70, 961.02 and 332.44 is: 498.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.70 : 961.02 = 332.44 : x
  2. Step 2: Convert to fraction form
    640.70/961.02 = 332.44/x
  3. Step 3: Cross multiply
    640.70x = 961.02 × 332.44
  4. Step 4: Simplify right side
    640.70x = 319,481.49
  5. Step 5: Solve for x
    x = 319,481.49/640.70
  6. Step 6: Final answer
    x = 498.64

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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.