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Finding the Fourth Proportional to 636.43, 878.26 and 370.88

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Solution

The fourth proportional to 636.43, 878.26 and 370.88 is: 511.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.43 : 878.26 = 370.88 : x
  2. Step 2: Convert to fraction form
    636.43/878.26 = 370.88/x
  3. Step 3: Cross multiply
    636.43x = 878.26 × 370.88
  4. Step 4: Simplify right side
    636.43x = 325,726.17
  5. Step 5: Solve for x
    x = 325,726.17/636.43
  6. Step 6: Final answer
    x = 511.80

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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.