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Finding the Fourth Proportional to 635.36, 876.30 and 438.80

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Solution

The fourth proportional to 635.36, 876.30 and 438.80 is: 605.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.36 : 876.30 = 438.80 : x
  2. Step 2: Convert to fraction form
    635.36/876.30 = 438.80/x
  3. Step 3: Cross multiply
    635.36x = 876.30 × 438.80
  4. Step 4: Simplify right side
    635.36x = 384,520.44
  5. Step 5: Solve for x
    x = 384,520.44/635.36
  6. Step 6: Final answer
    x = 605.20

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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.