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Finding the Fourth Proportional to 660.28, 991.33 and 335.87

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Solution

The fourth proportional to 660.28, 991.33 and 335.87 is: 504.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.28 : 991.33 = 335.87 : x
  2. Step 2: Convert to fraction form
    660.28/991.33 = 335.87/x
  3. Step 3: Cross multiply
    660.28x = 991.33 × 335.87
  4. Step 4: Simplify right side
    660.28x = 332,958.01
  5. Step 5: Solve for x
    x = 332,958.01/660.28
  6. Step 6: Final answer
    x = 504.27

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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.