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Finding the Fourth Proportional to 375.73, 518.48 and 209.91

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Solution

The fourth proportional to 375.73, 518.48 and 209.91 is: 289.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.73 : 518.48 = 209.91 : x
  2. Step 2: Convert to fraction form
    375.73/518.48 = 209.91/x
  3. Step 3: Cross multiply
    375.73x = 518.48 × 209.91
  4. Step 4: Simplify right side
    375.73x = 108,832.72
  5. Step 5: Solve for x
    x = 108,832.72/375.73
  6. Step 6: Final answer
    x = 289.66

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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.