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Finding the Fourth Proportional to 3,839.70, 5,751.45 and 3,191.70

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Solution

The fourth proportional to 3,839.70, 5,751.45 and 3,191.70 is: 4,780.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,839.70 : 5,751.45 = 3,191.70 : x
  2. Step 2: Convert to fraction form
    3,839.70/5,751.45 = 3,191.70/x
  3. Step 3: Cross multiply
    3,839.70x = 5,751.45 × 3,191.70
  4. Step 4: Simplify right side
    3,839.70x = 18,356,902.97
  5. Step 5: Solve for x
    x = 18,356,902.97/3,839.70
  6. Step 6: Final answer
    x = 4,780.82

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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.