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Finding the Fourth Proportional to 641.59, 961.50 and 332.81

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Solution

The fourth proportional to 641.59, 961.50 and 332.81 is: 498.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.59 : 961.50 = 332.81 : x
  2. Step 2: Convert to fraction form
    641.59/961.50 = 332.81/x
  3. Step 3: Cross multiply
    641.59x = 961.50 × 332.81
  4. Step 4: Simplify right side
    641.59x = 319,996.86
  5. Step 5: Solve for x
    x = 319,996.86/641.59
  6. Step 6: Final answer
    x = 498.76

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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.