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Finding the Fourth Proportional to 635.88, 876.96 and 439.20

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Solution

The fourth proportional to 635.88, 876.96 and 439.20 is: 605.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.88 : 876.96 = 439.20 : x
  2. Step 2: Convert to fraction form
    635.88/876.96 = 439.20/x
  3. Step 3: Cross multiply
    635.88x = 876.96 × 439.20
  4. Step 4: Simplify right side
    635.88x = 385,160.83
  5. Step 5: Solve for x
    x = 385,160.83/635.88
  6. Step 6: Final answer
    x = 605.71

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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.