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Finding the Fourth Proportional to 958.11, 1,437.41 and 381.03

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Solution

The fourth proportional to 958.11, 1,437.41 and 381.03 is: 571.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.11 : 1,437.41 = 381.03 : x
  2. Step 2: Convert to fraction form
    958.11/1,437.41 = 381.03/x
  3. Step 3: Cross multiply
    958.11x = 1,437.41 × 381.03
  4. Step 4: Simplify right side
    958.11x = 547,694.43
  5. Step 5: Solve for x
    x = 547,694.43/958.11
  6. Step 6: Final answer
    x = 571.64

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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.