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Finding the Fourth Proportional to 3,188.89, 4,780.76 and 996.49

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Solution

The fourth proportional to 3,188.89, 4,780.76 and 996.49 is: 1,493.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.89 : 4,780.76 = 996.49 : x
  2. Step 2: Convert to fraction form
    3,188.89/4,780.76 = 996.49/x
  3. Step 3: Cross multiply
    3,188.89x = 4,780.76 × 996.49
  4. Step 4: Simplify right side
    3,188.89x = 4,763,974.55
  5. Step 5: Solve for x
    x = 4,763,974.55/3,188.89
  6. Step 6: Final answer
    x = 1,493.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.