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Finding the Fourth Proportional to 635.78, 953.78 and 225.15

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Solution

The fourth proportional to 635.78, 953.78 and 225.15 is: 337.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.78 : 953.78 = 225.15 : x
  2. Step 2: Convert to fraction form
    635.78/953.78 = 225.15/x
  3. Step 3: Cross multiply
    635.78x = 953.78 × 225.15
  4. Step 4: Simplify right side
    635.78x = 214,742.44
  5. Step 5: Solve for x
    x = 214,742.44/635.78
  6. Step 6: Final answer
    x = 337.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.