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Finding the Fourth Proportional to 226.55, 339.64 and 104.78

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Solution

The fourth proportional to 226.55, 339.64 and 104.78 is: 157.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.55 : 339.64 = 104.78 : x
  2. Step 2: Convert to fraction form
    226.55/339.64 = 104.78/x
  3. Step 3: Cross multiply
    226.55x = 339.64 × 104.78
  4. Step 4: Simplify right side
    226.55x = 35,587.48
  5. Step 5: Solve for x
    x = 35,587.48/226.55
  6. Step 6: Final answer
    x = 157.08

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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.