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Finding the Fourth Proportional to 353.19, 486.33 and 254.76

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Solution

The fourth proportional to 353.19, 486.33 and 254.76 is: 350.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.19 : 486.33 = 254.76 : x
  2. Step 2: Convert to fraction form
    353.19/486.33 = 254.76/x
  3. Step 3: Cross multiply
    353.19x = 486.33 × 254.76
  4. Step 4: Simplify right side
    353.19x = 123,897.43
  5. Step 5: Solve for x
    x = 123,897.43/353.19
  6. Step 6: Final answer
    x = 350.80

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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.