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Finding the Fourth Proportional to 775, 1,069.54 and 443.42

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Solution

The fourth proportional to 775, 1,069.54 and 443.42 is: 611.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    775 : 1,069.54 = 443.42 : x
  2. Step 2: Convert to fraction form
    775/1,069.54 = 443.42/x
  3. Step 3: Cross multiply
    775x = 1,069.54 × 443.42
  4. Step 4: Simplify right side
    775x = 474,255.43
  5. Step 5: Solve for x
    x = 474,255.43/775
  6. Step 6: Final answer
    x = 611.94

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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.