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Finding the Fourth Proportional to 635, 876.26 and 355.28

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Solution

The fourth proportional to 635, 876.26 and 355.28 is: 490.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    635 : 876.26 = 355.28 : x
  2. Step 2: Convert to fraction form
    635/876.26 = 355.28/x
  3. Step 3: Cross multiply
    635x = 876.26 × 355.28
  4. Step 4: Simplify right side
    635x = 311,317.65
  5. Step 5: Solve for x
    x = 311,317.65/635
  6. Step 6: Final answer
    x = 490.26

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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.