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Finding the Fourth Proportional to 635.23, 876 and 448.39

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Solution

The fourth proportional to 635.23, 876 and 448.39 is: 618.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.23 : 876 = 448.39 : x
  2. Step 2: Convert to fraction form
    635.23/876 = 448.39/x
  3. Step 3: Cross multiply
    635.23x = 876 × 448.39
  4. Step 4: Simplify right side
    635.23x = 392,789.64
  5. Step 5: Solve for x
    x = 392,789.64/635.23
  6. Step 6: Final answer
    x = 618.34

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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.