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Finding the Fourth Proportional to 958.11, 1,437.57 and 381.39

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Solution

The fourth proportional to 958.11, 1,437.57 and 381.39 is: 572.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.11 : 1,437.57 = 381.39 : x
  2. Step 2: Convert to fraction form
    958.11/1,437.57 = 381.39/x
  3. Step 3: Cross multiply
    958.11x = 1,437.57 × 381.39
  4. Step 4: Simplify right side
    958.11x = 548,274.82
  5. Step 5: Solve for x
    x = 548,274.82/958.11
  6. Step 6: Final answer
    x = 572.25

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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.