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Finding the Fourth Proportional to 225.70, 336.59 and 221.38

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Solution

The fourth proportional to 225.70, 336.59 and 221.38 is: 330.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.70 : 336.59 = 221.38 : x
  2. Step 2: Convert to fraction form
    225.70/336.59 = 221.38/x
  3. Step 3: Cross multiply
    225.70x = 336.59 × 221.38
  4. Step 4: Simplify right side
    225.70x = 74,514.29
  5. Step 5: Solve for x
    x = 74,514.29/225.70
  6. Step 6: Final answer
    x = 330.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.