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Finding the Fourth Proportional to 433.76, 650.56 and 217.28

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Solution

The fourth proportional to 433.76, 650.56 and 217.28 is: 325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.76 : 650.56 = 217.28 : x
  2. Step 2: Convert to fraction form
    433.76/650.56 = 217.28/x
  3. Step 3: Cross multiply
    433.76x = 650.56 × 217.28
  4. Step 4: Simplify right side
    433.76x = 141,353.68
  5. Step 5: Solve for x
    x = 141,353.68/433.76
  6. Step 6: Final answer
    x = 325.88

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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.