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Finding the Fourth Proportional to 226.60, 312.06 and 221.80

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Solution

The fourth proportional to 226.60, 312.06 and 221.80 is: 305.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.60 : 312.06 = 221.80 : x
  2. Step 2: Convert to fraction form
    226.60/312.06 = 221.80/x
  3. Step 3: Cross multiply
    226.60x = 312.06 × 221.80
  4. Step 4: Simplify right side
    226.60x = 69,214.91
  5. Step 5: Solve for x
    x = 69,214.91/226.60
  6. Step 6: Final answer
    x = 305.45

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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.