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Finding the Fourth Proportional to 375.17, 517.72 and 217.70

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Solution

The fourth proportional to 375.17, 517.72 and 217.70 is: 300.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.17 : 517.72 = 217.70 : x
  2. Step 2: Convert to fraction form
    375.17/517.72 = 217.70/x
  3. Step 3: Cross multiply
    375.17x = 517.72 × 217.70
  4. Step 4: Simplify right side
    375.17x = 112,706.45
  5. Step 5: Solve for x
    x = 112,706.45/375.17
  6. Step 6: Final answer
    x = 300.42

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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.