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Finding the Fourth Proportional to 353, 489.22 and 347.60

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Solution

The fourth proportional to 353, 489.22 and 347.60 is: 481.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    353 : 489.22 = 347.60 : x
  2. Step 2: Convert to fraction form
    353/489.22 = 347.60/x
  3. Step 3: Cross multiply
    353x = 489.22 × 347.60
  4. Step 4: Simplify right side
    353x = 170,052.87
  5. Step 5: Solve for x
    x = 170,052.87/353
  6. Step 6: Final answer
    x = 481.74

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.