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Finding the Fourth Proportional to 3,969.80, 5,954.70 and 2,511.80

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Solution

The fourth proportional to 3,969.80, 5,954.70 and 2,511.80 is: 3,767.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.80 : 5,954.70 = 2,511.80 : x
  2. Step 2: Convert to fraction form
    3,969.80/5,954.70 = 2,511.80/x
  3. Step 3: Cross multiply
    3,969.80x = 5,954.70 × 2,511.80
  4. Step 4: Simplify right side
    3,969.80x = 14,957,015.46
  5. Step 5: Solve for x
    x = 14,957,015.46/3,969.80
  6. Step 6: Final answer
    x = 3,767.70

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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.