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Finding the Fourth Proportional to 319.97, 441.60 and 209.26

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Solution

The fourth proportional to 319.97, 441.60 and 209.26 is: 288.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.97 : 441.60 = 209.26 : x
  2. Step 2: Convert to fraction form
    319.97/441.60 = 209.26/x
  3. Step 3: Cross multiply
    319.97x = 441.60 × 209.26
  4. Step 4: Simplify right side
    319.97x = 92,409.22
  5. Step 5: Solve for x
    x = 92,409.22/319.97
  6. Step 6: Final answer
    x = 288.81

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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.