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Finding the Fourth Proportional to 375.13, 517.79 and 217.80

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Solution

The fourth proportional to 375.13, 517.79 and 217.80 is: 300.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.13 : 517.79 = 217.80 : x
  2. Step 2: Convert to fraction form
    375.13/517.79 = 217.80/x
  3. Step 3: Cross multiply
    375.13x = 517.79 × 217.80
  4. Step 4: Simplify right side
    375.13x = 112,774.66
  5. Step 5: Solve for x
    x = 112,774.66/375.13
  6. Step 6: Final answer
    x = 300.63

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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.