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Finding the Fourth Proportional to 3,512.40, 5,268.60 and 3,431.40

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Solution

The fourth proportional to 3,512.40, 5,268.60 and 3,431.40 is: 5,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,512.40 : 5,268.60 = 3,431.40 : x
  2. Step 2: Convert to fraction form
    3,512.40/5,268.60 = 3,431.40/x
  3. Step 3: Cross multiply
    3,512.40x = 5,268.60 × 3,431.40
  4. Step 4: Simplify right side
    3,512.40x = 18,078,674.04
  5. Step 5: Solve for x
    x = 18,078,674.04/3,512.40
  6. Step 6: Final answer
    x = 5,147.10

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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.