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Finding the Fourth Proportional to 225.60, 309.96 and 181.80

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Solution

The fourth proportional to 225.60, 309.96 and 181.80 is: 249.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.60 : 309.96 = 181.80 : x
  2. Step 2: Convert to fraction form
    225.60/309.96 = 181.80/x
  3. Step 3: Cross multiply
    225.60x = 309.96 × 181.80
  4. Step 4: Simplify right side
    225.60x = 56,350.73
  5. Step 5: Solve for x
    x = 56,350.73/225.60
  6. Step 6: Final answer
    x = 249.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.