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Finding the Fourth Proportional to 982.56, 1,474.92 and 958.80

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Solution

The fourth proportional to 982.56, 1,474.92 and 958.80 is: 1,439.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.56 : 1,474.92 = 958.80 : x
  2. Step 2: Convert to fraction form
    982.56/1,474.92 = 958.80/x
  3. Step 3: Cross multiply
    982.56x = 1,474.92 × 958.80
  4. Step 4: Simplify right side
    982.56x = 1,414,153.30
  5. Step 5: Solve for x
    x = 1,414,153.30/982.56
  6. Step 6: Final answer
    x = 1,439.25

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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.