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Finding the Fourth Proportional to 375.21, 562.20 and 131.61

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Solution

The fourth proportional to 375.21, 562.20 and 131.61 is: 197.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.21 : 562.20 = 131.61 : x
  2. Step 2: Convert to fraction form
    375.21/562.20 = 131.61/x
  3. Step 3: Cross multiply
    375.21x = 562.20 × 131.61
  4. Step 4: Simplify right side
    375.21x = 73,991.14
  5. Step 5: Solve for x
    x = 73,991.14/375.21
  6. Step 6: Final answer
    x = 197.20

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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.