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Finding the Fourth Proportional to 375.17, 561.90 and 331.38

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Solution

The fourth proportional to 375.17, 561.90 and 331.38 is: 496.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.17 : 561.90 = 331.38 : x
  2. Step 2: Convert to fraction form
    375.17/561.90 = 331.38/x
  3. Step 3: Cross multiply
    375.17x = 561.90 × 331.38
  4. Step 4: Simplify right side
    375.17x = 186,200.44
  5. Step 5: Solve for x
    x = 186,200.44/375.17
  6. Step 6: Final answer
    x = 496.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.