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Finding the Fourth Proportional to 635.43, 876.92 and 355.71

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Solution

The fourth proportional to 635.43, 876.92 and 355.71 is: 490.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.43 : 876.92 = 355.71 : x
  2. Step 2: Convert to fraction form
    635.43/876.92 = 355.71/x
  3. Step 3: Cross multiply
    635.43x = 876.92 × 355.71
  4. Step 4: Simplify right side
    635.43x = 311,929.21
  5. Step 5: Solve for x
    x = 311,929.21/635.43
  6. Step 6: Final answer
    x = 490.89

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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.