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Finding the Fourth Proportional to 958.44, 1,439.10 and 548.04

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Solution

The fourth proportional to 958.44, 1,439.10 and 548.04 is: 822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.44 : 1,439.10 = 548.04 : x
  2. Step 2: Convert to fraction form
    958.44/1,439.10 = 548.04/x
  3. Step 3: Cross multiply
    958.44x = 1,439.10 × 548.04
  4. Step 4: Simplify right side
    958.44x = 788,684.36
  5. Step 5: Solve for x
    x = 788,684.36/958.44
  6. Step 6: Final answer
    x = 822.88

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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.