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Finding the Fourth Proportional to 550.44, 759.56 and 317.57

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Solution

The fourth proportional to 550.44, 759.56 and 317.57 is: 438.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.44 : 759.56 = 317.57 : x
  2. Step 2: Convert to fraction form
    550.44/759.56 = 317.57/x
  3. Step 3: Cross multiply
    550.44x = 759.56 × 317.57
  4. Step 4: Simplify right side
    550.44x = 241,208.08
  5. Step 5: Solve for x
    x = 241,208.08/550.44
  6. Step 6: Final answer
    x = 438.21

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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.