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Finding the Fourth Proportional to 375.36, 517.95 and 209.56

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Solution

The fourth proportional to 375.36, 517.95 and 209.56 is: 289.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.36 : 517.95 = 209.56 : x
  2. Step 2: Convert to fraction form
    375.36/517.95 = 209.56/x
  3. Step 3: Cross multiply
    375.36x = 517.95 × 209.56
  4. Step 4: Simplify right side
    375.36x = 108,542.37
  5. Step 5: Solve for x
    x = 108,542.37/375.36
  6. Step 6: Final answer
    x = 289.17

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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.