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Finding the Fourth Proportional to 353.12, 486.79 and 247.89

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Solution

The fourth proportional to 353.12, 486.79 and 247.89 is: 341.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.12 : 486.79 = 247.89 : x
  2. Step 2: Convert to fraction form
    353.12/486.79 = 247.89/x
  3. Step 3: Cross multiply
    353.12x = 486.79 × 247.89
  4. Step 4: Simplify right side
    353.12x = 120,669.75
  5. Step 5: Solve for x
    x = 120,669.75/353.12
  6. Step 6: Final answer
    x = 341.72

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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.