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Finding the Fourth Proportional to 379.40, 569.22 and 225.44

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Solution

The fourth proportional to 379.40, 569.22 and 225.44 is: 338.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.40 : 569.22 = 225.44 : x
  2. Step 2: Convert to fraction form
    379.40/569.22 = 225.44/x
  3. Step 3: Cross multiply
    379.40x = 569.22 × 225.44
  4. Step 4: Simplify right side
    379.40x = 128,324.96
  5. Step 5: Solve for x
    x = 128,324.96/379.40
  6. Step 6: Final answer
    x = 338.23

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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.