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Finding the Fourth Proportional to 3,188.70, 4,781.70 and 996.84

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Solution

The fourth proportional to 3,188.70, 4,781.70 and 996.84 is: 1,494.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.70 : 4,781.70 = 996.84 : x
  2. Step 2: Convert to fraction form
    3,188.70/4,781.70 = 996.84/x
  3. Step 3: Cross multiply
    3,188.70x = 4,781.70 × 996.84
  4. Step 4: Simplify right side
    3,188.70x = 4,766,589.83
  5. Step 5: Solve for x
    x = 4,766,589.83/3,188.70
  6. Step 6: Final answer
    x = 1,494.84

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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.