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Finding the Fourth Proportional to 375.00, 517.49 and 209.21

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Solution

The fourth proportional to 375.00, 517.49 and 209.21 is: 288.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.00 : 517.49 = 209.21 : x
  2. Step 2: Convert to fraction form
    375.00/517.49 = 209.21/x
  3. Step 3: Cross multiply
    375.00x = 517.49 × 209.21
  4. Step 4: Simplify right side
    375.00x = 108,263.96
  5. Step 5: Solve for x
    x = 108,263.96/375.00
  6. Step 6: Final answer
    x = 288.70

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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.