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Finding the Fourth Proportional to 375.09, 517.61 and 209.31

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Solution

The fourth proportional to 375.09, 517.61 and 209.31 is: 288.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.09 : 517.61 = 209.31 : x
  2. Step 2: Convert to fraction form
    375.09/517.61 = 209.31/x
  3. Step 3: Cross multiply
    375.09x = 517.61 × 209.31
  4. Step 4: Simplify right side
    375.09x = 108,339.90
  5. Step 5: Solve for x
    x = 108,339.90/375.09
  6. Step 6: Final answer
    x = 288.84

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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.