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Finding the Fourth Proportional to 635.21, 876.26 and 448.40

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Solution

The fourth proportional to 635.21, 876.26 and 448.40 is: 618.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.21 : 876.26 = 448.40 : x
  2. Step 2: Convert to fraction form
    635.21/876.26 = 448.40/x
  3. Step 3: Cross multiply
    635.21x = 876.26 × 448.40
  4. Step 4: Simplify right side
    635.21x = 392,919.31
  5. Step 5: Solve for x
    x = 392,919.31/635.21
  6. Step 6: Final answer
    x = 618.57

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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.