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Finding the Fourth Proportional to 355.39, 531.26 and 273.38

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Solution

The fourth proportional to 355.39, 531.26 and 273.38 is: 408.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.39 : 531.26 = 273.38 : x
  2. Step 2: Convert to fraction form
    355.39/531.26 = 273.38/x
  3. Step 3: Cross multiply
    355.39x = 531.26 × 273.38
  4. Step 4: Simplify right side
    355.39x = 145,232.86
  5. Step 5: Solve for x
    x = 145,232.86/355.39
  6. Step 6: Final answer
    x = 408.66

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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.