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Finding the Fourth Proportional to 958.62, 1,438.50 and 548.34

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Solution

The fourth proportional to 958.62, 1,438.50 and 548.34 is: 822.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.62 : 1,438.50 = 548.34 : x
  2. Step 2: Convert to fraction form
    958.62/1,438.50 = 548.34/x
  3. Step 3: Cross multiply
    958.62x = 1,438.50 × 548.34
  4. Step 4: Simplify right side
    958.62x = 788,787.09
  5. Step 5: Solve for x
    x = 788,787.09/958.62
  6. Step 6: Final answer
    x = 822.84

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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.