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Finding the Fourth Proportional to 775.27, 1,069.85 and 439.17

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Solution

The fourth proportional to 775.27, 1,069.85 and 439.17 is: 606.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.27 : 1,069.85 = 439.17 : x
  2. Step 2: Convert to fraction form
    775.27/1,069.85 = 439.17/x
  3. Step 3: Cross multiply
    775.27x = 1,069.85 × 439.17
  4. Step 4: Simplify right side
    775.27x = 469,843.11
  5. Step 5: Solve for x
    x = 469,843.11/775.27
  6. Step 6: Final answer
    x = 606.04

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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.