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Finding the Fourth Proportional to 958.38, 1,322.49 and 538.65

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Solution

The fourth proportional to 958.38, 1,322.49 and 538.65 is: 743.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.38 : 1,322.49 = 538.65 : x
  2. Step 2: Convert to fraction form
    958.38/1,322.49 = 538.65/x
  3. Step 3: Cross multiply
    958.38x = 1,322.49 × 538.65
  4. Step 4: Simplify right side
    958.38x = 712,359.24
  5. Step 5: Solve for x
    x = 712,359.24/958.38
  6. Step 6: Final answer
    x = 743.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.