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Finding the Fourth Proportional to 958.25, 1,438.05 and 381.26

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Solution

The fourth proportional to 958.25, 1,438.05 and 381.26 is: 572.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.25 : 1,438.05 = 381.26 : x
  2. Step 2: Convert to fraction form
    958.25/1,438.05 = 381.26/x
  3. Step 3: Cross multiply
    958.25x = 1,438.05 × 381.26
  4. Step 4: Simplify right side
    958.25x = 548,270.94
  5. Step 5: Solve for x
    x = 548,270.94/958.25
  6. Step 6: Final answer
    x = 572.16

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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.