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Finding the Fourth Proportional to 225.56, 338.32 and 79.30

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Solution

The fourth proportional to 225.56, 338.32 and 79.30 is: 118.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.56 : 338.32 = 79.30 : x
  2. Step 2: Convert to fraction form
    225.56/338.32 = 79.30/x
  3. Step 3: Cross multiply
    225.56x = 338.32 × 79.30
  4. Step 4: Simplify right side
    225.56x = 26,827.08
  5. Step 5: Solve for x
    x = 26,827.08/225.56
  6. Step 6: Final answer
    x = 118.94

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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.