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Finding the Fourth Proportional to 3,969.40, 5,954.10 and 3,326.20

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Solution

The fourth proportional to 3,969.40, 5,954.10 and 3,326.20 is: 4,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.40 : 5,954.10 = 3,326.20 : x
  2. Step 2: Convert to fraction form
    3,969.40/5,954.10 = 3,326.20/x
  3. Step 3: Cross multiply
    3,969.40x = 5,954.10 × 3,326.20
  4. Step 4: Simplify right side
    3,969.40x = 19,804,527.42
  5. Step 5: Solve for x
    x = 19,804,527.42/3,969.40
  6. Step 6: Final answer
    x = 4,989.30

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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.