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Finding the Fourth Proportional to 332.80, 498.90 and 217.30

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Solution

The fourth proportional to 332.80, 498.90 and 217.30 is: 325.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.80 : 498.90 = 217.30 : x
  2. Step 2: Convert to fraction form
    332.80/498.90 = 217.30/x
  3. Step 3: Cross multiply
    332.80x = 498.90 × 217.30
  4. Step 4: Simplify right side
    332.80x = 108,410.97
  5. Step 5: Solve for x
    x = 108,410.97/332.80
  6. Step 6: Final answer
    x = 325.75

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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.