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Finding the Fourth Proportional to 660.33, 989.42 and 335.25

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Solution

The fourth proportional to 660.33, 989.42 and 335.25 is: 502.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.33 : 989.42 = 335.25 : x
  2. Step 2: Convert to fraction form
    660.33/989.42 = 335.25/x
  3. Step 3: Cross multiply
    660.33x = 989.42 × 335.25
  4. Step 4: Simplify right side
    660.33x = 331,701.38
  5. Step 5: Solve for x
    x = 331,701.38/660.33
  6. Step 6: Final answer
    x = 502.33

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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.