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Finding the Fourth Proportional to 3,628.40, 5,431.80 and 3,414.80

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Solution

The fourth proportional to 3,628.40, 5,431.80 and 3,414.80 is: 5,112.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,628.40 : 5,431.80 = 3,414.80 : x
  2. Step 2: Convert to fraction form
    3,628.40/5,431.80 = 3,414.80/x
  3. Step 3: Cross multiply
    3,628.40x = 5,431.80 × 3,414.80
  4. Step 4: Simplify right side
    3,628.40x = 18,548,510.64
  5. Step 5: Solve for x
    x = 18,548,510.64/3,628.40
  6. Step 6: Final answer
    x = 5,112.04

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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.