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Finding the Fourth Proportional to 379.39, 571.49 and 356.33

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Solution

The fourth proportional to 379.39, 571.49 and 356.33 is: 536.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.39 : 571.49 = 356.33 : x
  2. Step 2: Convert to fraction form
    379.39/571.49 = 356.33/x
  3. Step 3: Cross multiply
    379.39x = 571.49 × 356.33
  4. Step 4: Simplify right side
    379.39x = 203,640.02
  5. Step 5: Solve for x
    x = 203,640.02/379.39
  6. Step 6: Final answer
    x = 536.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.