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Finding the Fourth Proportional to 375.66, 518.37 and 209.88

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Solution

The fourth proportional to 375.66, 518.37 and 209.88 is: 289.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.66 : 518.37 = 209.88 : x
  2. Step 2: Convert to fraction form
    375.66/518.37 = 209.88/x
  3. Step 3: Cross multiply
    375.66x = 518.37 × 209.88
  4. Step 4: Simplify right side
    375.66x = 108,795.50
  5. Step 5: Solve for x
    x = 108,795.50/375.66
  6. Step 6: Final answer
    x = 289.61

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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.