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Finding the Fourth Proportional to 641.21, 884.86 and 375.71

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Solution

The fourth proportional to 641.21, 884.86 and 375.71 is: 518.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.21 : 884.86 = 375.71 : x
  2. Step 2: Convert to fraction form
    641.21/884.86 = 375.71/x
  3. Step 3: Cross multiply
    641.21x = 884.86 × 375.71
  4. Step 4: Simplify right side
    641.21x = 332,450.75
  5. Step 5: Solve for x
    x = 332,450.75/641.21
  6. Step 6: Final answer
    x = 518.47

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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.