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Finding the Fourth Proportional to 640.68, 961.24 and 332.60

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Solution

The fourth proportional to 640.68, 961.24 and 332.60 is: 499.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.68 : 961.24 = 332.60 : x
  2. Step 2: Convert to fraction form
    640.68/961.24 = 332.60/x
  3. Step 3: Cross multiply
    640.68x = 961.24 × 332.60
  4. Step 4: Simplify right side
    640.68x = 319,708.42
  5. Step 5: Solve for x
    x = 319,708.42/640.68
  6. Step 6: Final answer
    x = 499.01

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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.