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Finding the Fourth Proportional to 958.20, 1,437.39 and 381

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Solution

The fourth proportional to 958.20, 1,437.39 and 381 is: 571.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.20 : 1,437.39 = 381 : x
  2. Step 2: Convert to fraction form
    958.20/1,437.39 = 381/x
  3. Step 3: Cross multiply
    958.20x = 1,437.39 × 381
  4. Step 4: Simplify right side
    958.20x = 547,645.59
  5. Step 5: Solve for x
    x = 547,645.59/958.20
  6. Step 6: Final answer
    x = 571.54

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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.