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Finding the Fourth Proportional to 661.96, 992.46 and 332.68

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Solution

The fourth proportional to 661.96, 992.46 and 332.68 is: 498.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.96 : 992.46 = 332.68 : x
  2. Step 2: Convert to fraction form
    661.96/992.46 = 332.68/x
  3. Step 3: Cross multiply
    661.96x = 992.46 × 332.68
  4. Step 4: Simplify right side
    661.96x = 330,171.59
  5. Step 5: Solve for x
    x = 330,171.59/661.96
  6. Step 6: Final answer
    x = 498.78

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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.