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Finding the Fourth Proportional to 375.31, 517.91 and 209.52

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Solution

The fourth proportional to 375.31, 517.91 and 209.52 is: 289.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.31 : 517.91 = 209.52 : x
  2. Step 2: Convert to fraction form
    375.31/517.91 = 209.52/x
  3. Step 3: Cross multiply
    375.31x = 517.91 × 209.52
  4. Step 4: Simplify right side
    375.31x = 108,512.50
  5. Step 5: Solve for x
    x = 108,512.50/375.31
  6. Step 6: Final answer
    x = 289.13

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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.