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Finding the Fourth Proportional to 640.18, 961.02 and 332.62

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Solution

The fourth proportional to 640.18, 961.02 and 332.62 is: 499.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.18 : 961.02 = 332.62 : x
  2. Step 2: Convert to fraction form
    640.18/961.02 = 332.62/x
  3. Step 3: Cross multiply
    640.18x = 961.02 × 332.62
  4. Step 4: Simplify right side
    640.18x = 319,654.47
  5. Step 5: Solve for x
    x = 319,654.47/640.18
  6. Step 6: Final answer
    x = 499.32

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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.